diff --git a/gen/jsonschema/schemas/ArtifactVerificationOptions.schema.json b/gen/jsonschema/schemas/ArtifactVerificationOptions.schema.json
index a67d26f5..a36bcb98 100644
--- a/gen/jsonschema/schemas/ArtifactVerificationOptions.schema.json
+++ b/gen/jsonschema/schemas/ArtifactVerificationOptions.schema.json
@@ -26,7 +26,17 @@
                 "tsaOptions": {
                     "$ref": "#/definitions/dev.sigstore.verification.v1.ArtifactVerificationOptions.TimestampAuthorityOptions",
                     "additionalProperties": false,
-                    "description": "Optional options for certificate signed timestamp verification. If none is provided, the default verification options are: Threshold: 1 Disable: false"
+                    "description": "Optional options for certificate signed timestamp verification. If none is provided, the default verification options are: Threshold: 0 Disable: true"
+                },
+                "integratedTsOptions": {
+                    "$ref": "#/definitions/dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogIntegratedTimestampOptions",
+                    "additionalProperties": false,
+                    "description": "Optional options for integrated timestamp verification. If none is provided, the default verification options are: Threshold: 0 Disable: true"
+                },
+                "observerOptions": {
+                    "$ref": "#/definitions/dev.sigstore.verification.v1.ArtifactVerificationOptions.ObserverTimestampOptions",
+                    "additionalProperties": false,
+                    "description": "Optional options for observed timestamp verification. If none is provided, the default verification options are: Threshold 1 Disable: false"
                 }
             },
             "additionalProperties": false,
@@ -56,6 +66,16 @@
                     "required": [
                         "tsa_options"
                     ]
+                },
+                {
+                    "required": [
+                        "integrated_ts_options"
+                    ]
+                },
+                {
+                    "required": [
+                        "observer_options"
+                    ]
                 }
             ],
             "title": "Artifact Verification Options",
@@ -212,6 +232,21 @@
             "type": "object",
             "title": "Ctlog Options"
         },
+        "dev.sigstore.verification.v1.ArtifactVerificationOptions.ObserverTimestampOptions": {
+            "properties": {
+                "threshold": {
+                    "type": "integer",
+                    "description": "The number of external observers of the timestamp. This is a union of RFC3161 signed timestamps, and integrated timestamps from a transparency log, that could include additional timestamp sources in the future."
+                },
+                "disable": {
+                    "type": "boolean",
+                    "description": "Disable observer timestamp verification."
+                }
+            },
+            "additionalProperties": false,
+            "type": "object",
+            "title": "Observer Timestamp Options"
+        },
         "dev.sigstore.verification.v1.ArtifactVerificationOptions.TimestampAuthorityOptions": {
             "properties": {
                 "threshold": {
@@ -227,6 +262,21 @@
             "type": "object",
             "title": "Timestamp Authority Options"
         },
+        "dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogIntegratedTimestampOptions": {
+            "properties": {
+                "threshold": {
+                    "type": "integer",
+                    "description": "The number of integrated timestamps that are expected."
+                },
+                "disable": {
+                    "type": "boolean",
+                    "description": "Disable integrated timestamp verification."
+                }
+            },
+            "additionalProperties": false,
+            "type": "object",
+            "title": "Tlog Integrated Timestamp Options"
+        },
         "dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogOptions": {
             "properties": {
                 "threshold": {
diff --git a/gen/jsonschema/schemas/Input.schema.json b/gen/jsonschema/schemas/Input.schema.json
index b5fe5060..83a625e6 100644
--- a/gen/jsonschema/schemas/Input.schema.json
+++ b/gen/jsonschema/schemas/Input.schema.json
@@ -662,7 +662,17 @@
                 "tsaOptions": {
                     "$ref": "#/definitions/dev.sigstore.verification.v1.ArtifactVerificationOptions.TimestampAuthorityOptions",
                     "additionalProperties": false,
-                    "description": "Optional options for certificate signed timestamp verification. If none is provided, the default verification options are: Threshold: 1 Disable: false"
+                    "description": "Optional options for certificate signed timestamp verification. If none is provided, the default verification options are: Threshold: 0 Disable: true"
+                },
+                "integratedTsOptions": {
+                    "$ref": "#/definitions/dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogIntegratedTimestampOptions",
+                    "additionalProperties": false,
+                    "description": "Optional options for integrated timestamp verification. If none is provided, the default verification options are: Threshold: 0 Disable: true"
+                },
+                "observerOptions": {
+                    "$ref": "#/definitions/dev.sigstore.verification.v1.ArtifactVerificationOptions.ObserverTimestampOptions",
+                    "additionalProperties": false,
+                    "description": "Optional options for observed timestamp verification. If none is provided, the default verification options are: Threshold 1 Disable: false"
                 }
             },
             "additionalProperties": false,
@@ -692,6 +702,16 @@
                     "required": [
                         "tsa_options"
                     ]
+                },
+                {
+                    "required": [
+                        "integrated_ts_options"
+                    ]
+                },
+                {
+                    "required": [
+                        "observer_options"
+                    ]
                 }
             ],
             "title": "Artifact Verification Options",
@@ -712,6 +732,21 @@
             "type": "object",
             "title": "Ctlog Options"
         },
+        "dev.sigstore.verification.v1.ArtifactVerificationOptions.ObserverTimestampOptions": {
+            "properties": {
+                "threshold": {
+                    "type": "integer",
+                    "description": "The number of external observers of the timestamp. This is a union of RFC3161 signed timestamps, and integrated timestamps from a transparency log, that could include additional timestamp sources in the future."
+                },
+                "disable": {
+                    "type": "boolean",
+                    "description": "Disable observer timestamp verification."
+                }
+            },
+            "additionalProperties": false,
+            "type": "object",
+            "title": "Observer Timestamp Options"
+        },
         "dev.sigstore.verification.v1.ArtifactVerificationOptions.TimestampAuthorityOptions": {
             "properties": {
                 "threshold": {
@@ -727,6 +762,21 @@
             "type": "object",
             "title": "Timestamp Authority Options"
         },
+        "dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogIntegratedTimestampOptions": {
+            "properties": {
+                "threshold": {
+                    "type": "integer",
+                    "description": "The number of integrated timestamps that are expected."
+                },
+                "disable": {
+                    "type": "boolean",
+                    "description": "Disable integrated timestamp verification."
+                }
+            },
+            "additionalProperties": false,
+            "type": "object",
+            "title": "Tlog Integrated Timestamp Options"
+        },
         "dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogOptions": {
             "properties": {
                 "threshold": {
diff --git a/gen/pb-go/verification/v1/sigstore_verification.pb.go b/gen/pb-go/verification/v1/sigstore_verification.pb.go
index ea752053..95099784 100644
--- a/gen/pb-go/verification/v1/sigstore_verification.pb.go
+++ b/gen/pb-go/verification/v1/sigstore_verification.pb.go
@@ -228,9 +228,19 @@ type ArtifactVerificationOptions struct {
 	CtlogOptions *ArtifactVerificationOptions_CtlogOptions `protobuf:"bytes,4,opt,name=ctlog_options,json=ctlogOptions,proto3,oneof" json:"ctlog_options,omitempty"`
 	// Optional options for certificate signed timestamp verification.
 	// If none is provided, the default verification options are:
-	// Threshold: 1
-	// Disable: false
+	// Threshold: 0
+	// Disable: true
 	TsaOptions *ArtifactVerificationOptions_TimestampAuthorityOptions `protobuf:"bytes,5,opt,name=tsa_options,json=tsaOptions,proto3,oneof" json:"tsa_options,omitempty"`
+	// Optional options for integrated timestamp verification.
+	// If none is provided, the default verification options are:
+	// Threshold: 0
+	// Disable: true
+	IntegratedTsOptions *ArtifactVerificationOptions_TlogIntegratedTimestampOptions `protobuf:"bytes,6,opt,name=integrated_ts_options,json=integratedTsOptions,proto3,oneof" json:"integrated_ts_options,omitempty"`
+	// Optional options for observed timestamp verification.
+	// If none is provided, the default verification options are:
+	// Threshold 1
+	// Disable: false
+	ObserverOptions *ArtifactVerificationOptions_ObserverTimestampOptions `protobuf:"bytes,7,opt,name=observer_options,json=observerOptions,proto3,oneof" json:"observer_options,omitempty"`
 }
 
 func (x *ArtifactVerificationOptions) Reset() {
@@ -307,6 +317,20 @@ func (x *ArtifactVerificationOptions) GetTsaOptions() *ArtifactVerificationOptio
 	return nil
 }
 
+func (x *ArtifactVerificationOptions) GetIntegratedTsOptions() *ArtifactVerificationOptions_TlogIntegratedTimestampOptions {
+	if x != nil {
+		return x.IntegratedTsOptions
+	}
+	return nil
+}
+
+func (x *ArtifactVerificationOptions) GetObserverOptions() *ArtifactVerificationOptions_ObserverTimestampOptions {
+	if x != nil {
+		return x.ObserverOptions
+	}
+	return nil
+}
+
 type isArtifactVerificationOptions_Signers interface {
 	isArtifactVerificationOptions_Signers()
 }
@@ -679,6 +703,124 @@ func (x *ArtifactVerificationOptions_TimestampAuthorityOptions) GetDisable() boo
 	return false
 }
 
+type ArtifactVerificationOptions_TlogIntegratedTimestampOptions struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The number of integrated timestamps that are expected.
+	Threshold int32 `protobuf:"varint,1,opt,name=threshold,proto3" json:"threshold,omitempty"`
+	// Disable integrated timestamp verification.
+	Disable bool `protobuf:"varint,2,opt,name=disable,proto3" json:"disable,omitempty"`
+}
+
+func (x *ArtifactVerificationOptions_TlogIntegratedTimestampOptions) Reset() {
+	*x = ArtifactVerificationOptions_TlogIntegratedTimestampOptions{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_sigstore_verification_proto_msgTypes[9]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ArtifactVerificationOptions_TlogIntegratedTimestampOptions) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ArtifactVerificationOptions_TlogIntegratedTimestampOptions) ProtoMessage() {}
+
+func (x *ArtifactVerificationOptions_TlogIntegratedTimestampOptions) ProtoReflect() protoreflect.Message {
+	mi := &file_sigstore_verification_proto_msgTypes[9]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ArtifactVerificationOptions_TlogIntegratedTimestampOptions.ProtoReflect.Descriptor instead.
+func (*ArtifactVerificationOptions_TlogIntegratedTimestampOptions) Descriptor() ([]byte, []int) {
+	return file_sigstore_verification_proto_rawDescGZIP(), []int{3, 3}
+}
+
+func (x *ArtifactVerificationOptions_TlogIntegratedTimestampOptions) GetThreshold() int32 {
+	if x != nil {
+		return x.Threshold
+	}
+	return 0
+}
+
+func (x *ArtifactVerificationOptions_TlogIntegratedTimestampOptions) GetDisable() bool {
+	if x != nil {
+		return x.Disable
+	}
+	return false
+}
+
+type ArtifactVerificationOptions_ObserverTimestampOptions struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	// The number of external observers of the timestamp.
+	// This is a union of RFC3161 signed timestamps, and
+	// integrated timestamps from a transparency log, that
+	// could include additional timestamp sources in the
+	// future.
+	Threshold int32 `protobuf:"varint,1,opt,name=threshold,proto3" json:"threshold,omitempty"`
+	// Disable observer timestamp verification.
+	Disable bool `protobuf:"varint,2,opt,name=disable,proto3" json:"disable,omitempty"`
+}
+
+func (x *ArtifactVerificationOptions_ObserverTimestampOptions) Reset() {
+	*x = ArtifactVerificationOptions_ObserverTimestampOptions{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_sigstore_verification_proto_msgTypes[10]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ArtifactVerificationOptions_ObserverTimestampOptions) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ArtifactVerificationOptions_ObserverTimestampOptions) ProtoMessage() {}
+
+func (x *ArtifactVerificationOptions_ObserverTimestampOptions) ProtoReflect() protoreflect.Message {
+	mi := &file_sigstore_verification_proto_msgTypes[10]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ArtifactVerificationOptions_ObserverTimestampOptions.ProtoReflect.Descriptor instead.
+func (*ArtifactVerificationOptions_ObserverTimestampOptions) Descriptor() ([]byte, []int) {
+	return file_sigstore_verification_proto_rawDescGZIP(), []int{3, 4}
+}
+
+func (x *ArtifactVerificationOptions_ObserverTimestampOptions) GetThreshold() int32 {
+	if x != nil {
+		return x.Threshold
+	}
+	return 0
+}
+
+func (x *ArtifactVerificationOptions_ObserverTimestampOptions) GetDisable() bool {
+	if x != nil {
+		return x.Disable
+	}
+	return false
+}
+
 var File_sigstore_verification_proto protoreflect.FileDescriptor
 
 var file_sigstore_verification_proto_rawDesc = []byte{
@@ -714,7 +856,7 @@ var file_sigstore_verification_proto_rawDesc = []byte{
 	0x20, 0x03, 0x28, 0x0b, 0x32, 0x21, 0x2e, 0x64, 0x65, 0x76, 0x2e, 0x73, 0x69, 0x67, 0x73, 0x74,
 	0x6f, 0x72, 0x65, 0x2e, 0x63, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x2e, 0x76, 0x31, 0x2e, 0x50, 0x75,
 	0x62, 0x6c, 0x69, 0x63, 0x4b, 0x65, 0x79, 0x52, 0x0a, 0x70, 0x75, 0x62, 0x6c, 0x69, 0x63, 0x4b,
-	0x65, 0x79, 0x73, 0x22, 0xa6, 0x07, 0x0a, 0x1b, 0x41, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74,
+	0x65, 0x79, 0x73, 0x22, 0x9c, 0x0b, 0x0a, 0x1b, 0x41, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74,
 	0x56, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x4f, 0x70, 0x74, 0x69,
 	0x6f, 0x6e, 0x73, 0x12, 0x6c, 0x0a, 0x16, 0x63, 0x65, 0x72, 0x74, 0x69, 0x66, 0x69, 0x63, 0x61,
 	0x74, 0x65, 0x5f, 0x69, 0x64, 0x65, 0x6e, 0x74, 0x69, 0x74, 0x69, 0x65, 0x73, 0x18, 0x01, 0x20,
@@ -750,68 +892,99 @@ var file_sigstore_verification_proto_rawDesc = []byte{
 	0x6e, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x54, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61,
 	0x6d, 0x70, 0x41, 0x75, 0x74, 0x68, 0x6f, 0x72, 0x69, 0x74, 0x79, 0x4f, 0x70, 0x74, 0x69, 0x6f,
 	0x6e, 0x73, 0x48, 0x03, 0x52, 0x0a, 0x74, 0x73, 0x61, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73,
-	0x88, 0x01, 0x01, 0x1a, 0x85, 0x01, 0x0a, 0x0b, 0x54, 0x6c, 0x6f, 0x67, 0x4f, 0x70, 0x74, 0x69,
-	0x6f, 0x6e, 0x73, 0x12, 0x1c, 0x0a, 0x09, 0x74, 0x68, 0x72, 0x65, 0x73, 0x68, 0x6f, 0x6c, 0x64,
-	0x18, 0x01, 0x20, 0x01, 0x28, 0x05, 0x52, 0x09, 0x74, 0x68, 0x72, 0x65, 0x73, 0x68, 0x6f, 0x6c,
-	0x64, 0x12, 0x3e, 0x0a, 0x1b, 0x70, 0x65, 0x72, 0x66, 0x6f, 0x72, 0x6d, 0x5f, 0x6f, 0x6e, 0x6c,
-	0x69, 0x6e, 0x65, 0x5f, 0x76, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e,
-	0x18, 0x02, 0x20, 0x01, 0x28, 0x08, 0x52, 0x19, 0x70, 0x65, 0x72, 0x66, 0x6f, 0x72, 0x6d, 0x4f,
-	0x6e, 0x6c, 0x69, 0x6e, 0x65, 0x56, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f,
-	0x6e, 0x12, 0x18, 0x0a, 0x07, 0x64, 0x69, 0x73, 0x61, 0x62, 0x6c, 0x65, 0x18, 0x03, 0x20, 0x01,
-	0x28, 0x08, 0x52, 0x07, 0x64, 0x69, 0x73, 0x61, 0x62, 0x6c, 0x65, 0x1a, 0x4c, 0x0a, 0x0c, 0x43,
-	0x74, 0x6c, 0x6f, 0x67, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x12, 0x1c, 0x0a, 0x09, 0x74,
-	0x68, 0x72, 0x65, 0x73, 0x68, 0x6f, 0x6c, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05, 0x52, 0x09,
-	0x74, 0x68, 0x72, 0x65, 0x73, 0x68, 0x6f, 0x6c, 0x64, 0x12, 0x18, 0x0a, 0x07, 0x64, 0x69, 0x73,
-	0x61, 0x62, 0x6c, 0x65, 0x18, 0x03, 0x20, 0x01, 0x28, 0x08, 0x52, 0x07, 0x64, 0x69, 0x73, 0x61,
-	0x62, 0x6c, 0x65, 0x4a, 0x04, 0x08, 0x02, 0x10, 0x03, 0x1a, 0x53, 0x0a, 0x19, 0x54, 0x69, 0x6d,
-	0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x41, 0x75, 0x74, 0x68, 0x6f, 0x72, 0x69, 0x74, 0x79, 0x4f,
-	0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x12, 0x1c, 0x0a, 0x09, 0x74, 0x68, 0x72, 0x65, 0x73, 0x68,
-	0x6f, 0x6c, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05, 0x52, 0x09, 0x74, 0x68, 0x72, 0x65, 0x73,
-	0x68, 0x6f, 0x6c, 0x64, 0x12, 0x18, 0x0a, 0x07, 0x64, 0x69, 0x73, 0x61, 0x62, 0x6c, 0x65, 0x18,
-	0x02, 0x20, 0x01, 0x28, 0x08, 0x52, 0x07, 0x64, 0x69, 0x73, 0x61, 0x62, 0x6c, 0x65, 0x42, 0x09,
-	0x0a, 0x07, 0x73, 0x69, 0x67, 0x6e, 0x65, 0x72, 0x73, 0x42, 0x0f, 0x0a, 0x0d, 0x5f, 0x74, 0x6c,
-	0x6f, 0x67, 0x5f, 0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x42, 0x10, 0x0a, 0x0e, 0x5f, 0x63,
-	0x74, 0x6c, 0x6f, 0x67, 0x5f, 0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x42, 0x0e, 0x0a, 0x0c,
-	0x5f, 0x74, 0x73, 0x61, 0x5f, 0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x22, 0x55, 0x0a, 0x08,
-	0x41, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x12, 0x23, 0x0a, 0x0c, 0x61, 0x72, 0x74, 0x69,
-	0x66, 0x61, 0x63, 0x74, 0x5f, 0x75, 0x72, 0x69, 0x18, 0x01, 0x20, 0x01, 0x28, 0x09, 0x48, 0x00,
-	0x52, 0x0b, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x55, 0x72, 0x69, 0x12, 0x1c, 0x0a,
-	0x08, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0c, 0x48,
-	0x00, 0x52, 0x08, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x42, 0x06, 0x0a, 0x04, 0x64,
-	0x61, 0x74, 0x61, 0x22, 0xec, 0x02, 0x0a, 0x05, 0x49, 0x6e, 0x70, 0x75, 0x74, 0x12, 0x56, 0x0a,
-	0x13, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x5f, 0x74, 0x72, 0x75, 0x73, 0x74, 0x5f,
-	0x72, 0x6f, 0x6f, 0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x26, 0x2e, 0x64, 0x65, 0x76,
-	0x2e, 0x73, 0x69, 0x67, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x2e, 0x74, 0x72, 0x75, 0x73, 0x74, 0x72,
-	0x6f, 0x6f, 0x74, 0x2e, 0x76, 0x31, 0x2e, 0x54, 0x72, 0x75, 0x73, 0x74, 0x65, 0x64, 0x52, 0x6f,
-	0x6f, 0x74, 0x52, 0x11, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x54, 0x72, 0x75, 0x73,
-	0x74, 0x52, 0x6f, 0x6f, 0x74, 0x12, 0x7d, 0x0a, 0x1d, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63,
-	0x74, 0x5f, 0x76, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x5f, 0x6f,
-	0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x18, 0x02, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x39, 0x2e, 0x64,
-	0x65, 0x76, 0x2e, 0x73, 0x69, 0x67, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x2e, 0x76, 0x65, 0x72, 0x69,
-	0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2e, 0x76, 0x31, 0x2e, 0x41, 0x72, 0x74, 0x69,
-	0x66, 0x61, 0x63, 0x74, 0x56, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e,
-	0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x52, 0x1b, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63,
-	0x74, 0x56, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x4f, 0x70, 0x74,
-	0x69, 0x6f, 0x6e, 0x73, 0x12, 0x36, 0x0a, 0x06, 0x62, 0x75, 0x6e, 0x64, 0x6c, 0x65, 0x18, 0x03,
-	0x20, 0x01, 0x28, 0x0b, 0x32, 0x1e, 0x2e, 0x64, 0x65, 0x76, 0x2e, 0x73, 0x69, 0x67, 0x73, 0x74,
-	0x6f, 0x72, 0x65, 0x2e, 0x62, 0x75, 0x6e, 0x64, 0x6c, 0x65, 0x2e, 0x76, 0x31, 0x2e, 0x42, 0x75,
-	0x6e, 0x64, 0x6c, 0x65, 0x52, 0x06, 0x62, 0x75, 0x6e, 0x64, 0x6c, 0x65, 0x12, 0x47, 0x0a, 0x08,
-	0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x18, 0x04, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x26,
-	0x2e, 0x64, 0x65, 0x76, 0x2e, 0x73, 0x69, 0x67, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x2e, 0x76, 0x65,
-	0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2e, 0x76, 0x31, 0x2e, 0x41, 0x72,
-	0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x48, 0x00, 0x52, 0x08, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61,
-	0x63, 0x74, 0x88, 0x01, 0x01, 0x42, 0x0b, 0x0a, 0x09, 0x5f, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61,
-	0x63, 0x74, 0x42, 0x94, 0x01, 0x0a, 0x22, 0x64, 0x65, 0x76, 0x2e, 0x73, 0x69, 0x67, 0x73, 0x74,
-	0x6f, 0x72, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2e, 0x76, 0x65, 0x72, 0x69, 0x66, 0x69,
-	0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2e, 0x76, 0x31, 0x42, 0x11, 0x56, 0x65, 0x72, 0x69, 0x66,
-	0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x50, 0x72, 0x6f, 0x74, 0x6f, 0x50, 0x01, 0x5a, 0x3c,
-	0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x73, 0x69, 0x67, 0x73, 0x74,
-	0x6f, 0x72, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62, 0x75, 0x66, 0x2d, 0x73, 0x70, 0x65,
-	0x63, 0x73, 0x2f, 0x67, 0x65, 0x6e, 0x2f, 0x70, 0x62, 0x2d, 0x67, 0x6f, 0x2f, 0x76, 0x65, 0x72,
-	0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2f, 0x76, 0x31, 0xea, 0x02, 0x1a, 0x53,
-	0x69, 0x67, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x3a, 0x3a, 0x56, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63,
-	0x61, 0x74, 0x69, 0x6f, 0x6e, 0x3a, 0x3a, 0x56, 0x31, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f,
-	0x33,
+	0x88, 0x01, 0x01, 0x12, 0x91, 0x01, 0x0a, 0x15, 0x69, 0x6e, 0x74, 0x65, 0x67, 0x72, 0x61, 0x74,
+	0x65, 0x64, 0x5f, 0x74, 0x73, 0x5f, 0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x18, 0x06, 0x20,
+	0x01, 0x28, 0x0b, 0x32, 0x58, 0x2e, 0x64, 0x65, 0x76, 0x2e, 0x73, 0x69, 0x67, 0x73, 0x74, 0x6f,
+	0x72, 0x65, 0x2e, 0x76, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2e,
+	0x76, 0x31, 0x2e, 0x41, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x56, 0x65, 0x72, 0x69, 0x66,
+	0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x54,
+	0x6c, 0x6f, 0x67, 0x49, 0x6e, 0x74, 0x65, 0x67, 0x72, 0x61, 0x74, 0x65, 0x64, 0x54, 0x69, 0x6d,
+	0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x48, 0x04, 0x52,
+	0x13, 0x69, 0x6e, 0x74, 0x65, 0x67, 0x72, 0x61, 0x74, 0x65, 0x64, 0x54, 0x73, 0x4f, 0x70, 0x74,
+	0x69, 0x6f, 0x6e, 0x73, 0x88, 0x01, 0x01, 0x12, 0x82, 0x01, 0x0a, 0x10, 0x6f, 0x62, 0x73, 0x65,
+	0x72, 0x76, 0x65, 0x72, 0x5f, 0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x18, 0x07, 0x20, 0x01,
+	0x28, 0x0b, 0x32, 0x52, 0x2e, 0x64, 0x65, 0x76, 0x2e, 0x73, 0x69, 0x67, 0x73, 0x74, 0x6f, 0x72,
+	0x65, 0x2e, 0x76, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2e, 0x76,
+	0x31, 0x2e, 0x41, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x56, 0x65, 0x72, 0x69, 0x66, 0x69,
+	0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x2e, 0x4f, 0x62,
+	0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x54, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x4f,
+	0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x48, 0x05, 0x52, 0x0f, 0x6f, 0x62, 0x73, 0x65, 0x72, 0x76,
+	0x65, 0x72, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x88, 0x01, 0x01, 0x1a, 0x85, 0x01, 0x0a,
+	0x0b, 0x54, 0x6c, 0x6f, 0x67, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x12, 0x1c, 0x0a, 0x09,
+	0x74, 0x68, 0x72, 0x65, 0x73, 0x68, 0x6f, 0x6c, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05, 0x52,
+	0x09, 0x74, 0x68, 0x72, 0x65, 0x73, 0x68, 0x6f, 0x6c, 0x64, 0x12, 0x3e, 0x0a, 0x1b, 0x70, 0x65,
+	0x72, 0x66, 0x6f, 0x72, 0x6d, 0x5f, 0x6f, 0x6e, 0x6c, 0x69, 0x6e, 0x65, 0x5f, 0x76, 0x65, 0x72,
+	0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x18, 0x02, 0x20, 0x01, 0x28, 0x08, 0x52,
+	0x19, 0x70, 0x65, 0x72, 0x66, 0x6f, 0x72, 0x6d, 0x4f, 0x6e, 0x6c, 0x69, 0x6e, 0x65, 0x56, 0x65,
+	0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x12, 0x18, 0x0a, 0x07, 0x64, 0x69,
+	0x73, 0x61, 0x62, 0x6c, 0x65, 0x18, 0x03, 0x20, 0x01, 0x28, 0x08, 0x52, 0x07, 0x64, 0x69, 0x73,
+	0x61, 0x62, 0x6c, 0x65, 0x1a, 0x4c, 0x0a, 0x0c, 0x43, 0x74, 0x6c, 0x6f, 0x67, 0x4f, 0x70, 0x74,
+	0x69, 0x6f, 0x6e, 0x73, 0x12, 0x1c, 0x0a, 0x09, 0x74, 0x68, 0x72, 0x65, 0x73, 0x68, 0x6f, 0x6c,
+	0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05, 0x52, 0x09, 0x74, 0x68, 0x72, 0x65, 0x73, 0x68, 0x6f,
+	0x6c, 0x64, 0x12, 0x18, 0x0a, 0x07, 0x64, 0x69, 0x73, 0x61, 0x62, 0x6c, 0x65, 0x18, 0x03, 0x20,
+	0x01, 0x28, 0x08, 0x52, 0x07, 0x64, 0x69, 0x73, 0x61, 0x62, 0x6c, 0x65, 0x4a, 0x04, 0x08, 0x02,
+	0x10, 0x03, 0x1a, 0x53, 0x0a, 0x19, 0x54, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x41,
+	0x75, 0x74, 0x68, 0x6f, 0x72, 0x69, 0x74, 0x79, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x12,
+	0x1c, 0x0a, 0x09, 0x74, 0x68, 0x72, 0x65, 0x73, 0x68, 0x6f, 0x6c, 0x64, 0x18, 0x01, 0x20, 0x01,
+	0x28, 0x05, 0x52, 0x09, 0x74, 0x68, 0x72, 0x65, 0x73, 0x68, 0x6f, 0x6c, 0x64, 0x12, 0x18, 0x0a,
+	0x07, 0x64, 0x69, 0x73, 0x61, 0x62, 0x6c, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x08, 0x52, 0x07,
+	0x64, 0x69, 0x73, 0x61, 0x62, 0x6c, 0x65, 0x1a, 0x58, 0x0a, 0x1e, 0x54, 0x6c, 0x6f, 0x67, 0x49,
+	0x6e, 0x74, 0x65, 0x67, 0x72, 0x61, 0x74, 0x65, 0x64, 0x54, 0x69, 0x6d, 0x65, 0x73, 0x74, 0x61,
+	0x6d, 0x70, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x12, 0x1c, 0x0a, 0x09, 0x74, 0x68, 0x72,
+	0x65, 0x73, 0x68, 0x6f, 0x6c, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05, 0x52, 0x09, 0x74, 0x68,
+	0x72, 0x65, 0x73, 0x68, 0x6f, 0x6c, 0x64, 0x12, 0x18, 0x0a, 0x07, 0x64, 0x69, 0x73, 0x61, 0x62,
+	0x6c, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x08, 0x52, 0x07, 0x64, 0x69, 0x73, 0x61, 0x62, 0x6c,
+	0x65, 0x1a, 0x52, 0x0a, 0x18, 0x4f, 0x62, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x54, 0x69, 0x6d,
+	0x65, 0x73, 0x74, 0x61, 0x6d, 0x70, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x12, 0x1c, 0x0a,
+	0x09, 0x74, 0x68, 0x72, 0x65, 0x73, 0x68, 0x6f, 0x6c, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x05,
+	0x52, 0x09, 0x74, 0x68, 0x72, 0x65, 0x73, 0x68, 0x6f, 0x6c, 0x64, 0x12, 0x18, 0x0a, 0x07, 0x64,
+	0x69, 0x73, 0x61, 0x62, 0x6c, 0x65, 0x18, 0x02, 0x20, 0x01, 0x28, 0x08, 0x52, 0x07, 0x64, 0x69,
+	0x73, 0x61, 0x62, 0x6c, 0x65, 0x42, 0x09, 0x0a, 0x07, 0x73, 0x69, 0x67, 0x6e, 0x65, 0x72, 0x73,
+	0x42, 0x0f, 0x0a, 0x0d, 0x5f, 0x74, 0x6c, 0x6f, 0x67, 0x5f, 0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e,
+	0x73, 0x42, 0x10, 0x0a, 0x0e, 0x5f, 0x63, 0x74, 0x6c, 0x6f, 0x67, 0x5f, 0x6f, 0x70, 0x74, 0x69,
+	0x6f, 0x6e, 0x73, 0x42, 0x0e, 0x0a, 0x0c, 0x5f, 0x74, 0x73, 0x61, 0x5f, 0x6f, 0x70, 0x74, 0x69,
+	0x6f, 0x6e, 0x73, 0x42, 0x18, 0x0a, 0x16, 0x5f, 0x69, 0x6e, 0x74, 0x65, 0x67, 0x72, 0x61, 0x74,
+	0x65, 0x64, 0x5f, 0x74, 0x73, 0x5f, 0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x42, 0x13, 0x0a,
+	0x11, 0x5f, 0x6f, 0x62, 0x73, 0x65, 0x72, 0x76, 0x65, 0x72, 0x5f, 0x6f, 0x70, 0x74, 0x69, 0x6f,
+	0x6e, 0x73, 0x22, 0x55, 0x0a, 0x08, 0x41, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x12, 0x23,
+	0x0a, 0x0c, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x5f, 0x75, 0x72, 0x69, 0x18, 0x01,
+	0x20, 0x01, 0x28, 0x09, 0x48, 0x00, 0x52, 0x0b, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74,
+	0x55, 0x72, 0x69, 0x12, 0x1c, 0x0a, 0x08, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x18,
+	0x02, 0x20, 0x01, 0x28, 0x0c, 0x48, 0x00, 0x52, 0x08, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63,
+	0x74, 0x42, 0x06, 0x0a, 0x04, 0x64, 0x61, 0x74, 0x61, 0x22, 0xec, 0x02, 0x0a, 0x05, 0x49, 0x6e,
+	0x70, 0x75, 0x74, 0x12, 0x56, 0x0a, 0x13, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x5f,
+	0x74, 0x72, 0x75, 0x73, 0x74, 0x5f, 0x72, 0x6f, 0x6f, 0x74, 0x18, 0x01, 0x20, 0x01, 0x28, 0x0b,
+	0x32, 0x26, 0x2e, 0x64, 0x65, 0x76, 0x2e, 0x73, 0x69, 0x67, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x2e,
+	0x74, 0x72, 0x75, 0x73, 0x74, 0x72, 0x6f, 0x6f, 0x74, 0x2e, 0x76, 0x31, 0x2e, 0x54, 0x72, 0x75,
+	0x73, 0x74, 0x65, 0x64, 0x52, 0x6f, 0x6f, 0x74, 0x52, 0x11, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61,
+	0x63, 0x74, 0x54, 0x72, 0x75, 0x73, 0x74, 0x52, 0x6f, 0x6f, 0x74, 0x12, 0x7d, 0x0a, 0x1d, 0x61,
+	0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x5f, 0x76, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61,
+	0x74, 0x69, 0x6f, 0x6e, 0x5f, 0x6f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x18, 0x02, 0x20, 0x01,
+	0x28, 0x0b, 0x32, 0x39, 0x2e, 0x64, 0x65, 0x76, 0x2e, 0x73, 0x69, 0x67, 0x73, 0x74, 0x6f, 0x72,
+	0x65, 0x2e, 0x76, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2e, 0x76,
+	0x31, 0x2e, 0x41, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x56, 0x65, 0x72, 0x69, 0x66, 0x69,
+	0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x52, 0x1b, 0x61,
+	0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x56, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74,
+	0x69, 0x6f, 0x6e, 0x4f, 0x70, 0x74, 0x69, 0x6f, 0x6e, 0x73, 0x12, 0x36, 0x0a, 0x06, 0x62, 0x75,
+	0x6e, 0x64, 0x6c, 0x65, 0x18, 0x03, 0x20, 0x01, 0x28, 0x0b, 0x32, 0x1e, 0x2e, 0x64, 0x65, 0x76,
+	0x2e, 0x73, 0x69, 0x67, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x2e, 0x62, 0x75, 0x6e, 0x64, 0x6c, 0x65,
+	0x2e, 0x76, 0x31, 0x2e, 0x42, 0x75, 0x6e, 0x64, 0x6c, 0x65, 0x52, 0x06, 0x62, 0x75, 0x6e, 0x64,
+	0x6c, 0x65, 0x12, 0x47, 0x0a, 0x08, 0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x18, 0x04,
+	0x20, 0x01, 0x28, 0x0b, 0x32, 0x26, 0x2e, 0x64, 0x65, 0x76, 0x2e, 0x73, 0x69, 0x67, 0x73, 0x74,
+	0x6f, 0x72, 0x65, 0x2e, 0x76, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e,
+	0x2e, 0x76, 0x31, 0x2e, 0x41, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x48, 0x00, 0x52, 0x08,
+	0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x88, 0x01, 0x01, 0x42, 0x0b, 0x0a, 0x09, 0x5f,
+	0x61, 0x72, 0x74, 0x69, 0x66, 0x61, 0x63, 0x74, 0x42, 0x94, 0x01, 0x0a, 0x22, 0x64, 0x65, 0x76,
+	0x2e, 0x73, 0x69, 0x67, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x2e, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2e,
+	0x76, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2e, 0x76, 0x31, 0x42,
+	0x11, 0x56, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x50, 0x72, 0x6f,
+	0x74, 0x6f, 0x50, 0x01, 0x5a, 0x3c, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f, 0x6d,
+	0x2f, 0x73, 0x69, 0x67, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x2f, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x62,
+	0x75, 0x66, 0x2d, 0x73, 0x70, 0x65, 0x63, 0x73, 0x2f, 0x67, 0x65, 0x6e, 0x2f, 0x70, 0x62, 0x2d,
+	0x67, 0x6f, 0x2f, 0x76, 0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x2f,
+	0x76, 0x31, 0xea, 0x02, 0x1a, 0x53, 0x69, 0x67, 0x73, 0x74, 0x6f, 0x72, 0x65, 0x3a, 0x3a, 0x56,
+	0x65, 0x72, 0x69, 0x66, 0x69, 0x63, 0x61, 0x74, 0x69, 0x6f, 0x6e, 0x3a, 0x3a, 0x56, 0x31, 0x62,
+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
@@ -826,42 +999,46 @@ func file_sigstore_verification_proto_rawDescGZIP() []byte {
 	return file_sigstore_verification_proto_rawDescData
 }
 
-var file_sigstore_verification_proto_msgTypes = make([]protoimpl.MessageInfo, 9)
+var file_sigstore_verification_proto_msgTypes = make([]protoimpl.MessageInfo, 11)
 var file_sigstore_verification_proto_goTypes = []interface{}{
-	(*CertificateIdentity)(nil),                                   // 0: dev.sigstore.verification.v1.CertificateIdentity
-	(*CertificateIdentities)(nil),                                 // 1: dev.sigstore.verification.v1.CertificateIdentities
-	(*PublicKeyIdentities)(nil),                                   // 2: dev.sigstore.verification.v1.PublicKeyIdentities
-	(*ArtifactVerificationOptions)(nil),                           // 3: dev.sigstore.verification.v1.ArtifactVerificationOptions
-	(*Artifact)(nil),                                              // 4: dev.sigstore.verification.v1.Artifact
-	(*Input)(nil),                                                 // 5: dev.sigstore.verification.v1.Input
-	(*ArtifactVerificationOptions_TlogOptions)(nil),               // 6: dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogOptions
-	(*ArtifactVerificationOptions_CtlogOptions)(nil),              // 7: dev.sigstore.verification.v1.ArtifactVerificationOptions.CtlogOptions
-	(*ArtifactVerificationOptions_TimestampAuthorityOptions)(nil), // 8: dev.sigstore.verification.v1.ArtifactVerificationOptions.TimestampAuthorityOptions
-	(*v1.SubjectAlternativeName)(nil),                             // 9: dev.sigstore.common.v1.SubjectAlternativeName
-	(*v1.ObjectIdentifierValuePair)(nil),                          // 10: dev.sigstore.common.v1.ObjectIdentifierValuePair
-	(*v1.PublicKey)(nil),                                          // 11: dev.sigstore.common.v1.PublicKey
-	(*v11.TrustedRoot)(nil),                                       // 12: dev.sigstore.trustroot.v1.TrustedRoot
-	(*v12.Bundle)(nil),                                            // 13: dev.sigstore.bundle.v1.Bundle
+	(*CertificateIdentity)(nil),                                        // 0: dev.sigstore.verification.v1.CertificateIdentity
+	(*CertificateIdentities)(nil),                                      // 1: dev.sigstore.verification.v1.CertificateIdentities
+	(*PublicKeyIdentities)(nil),                                        // 2: dev.sigstore.verification.v1.PublicKeyIdentities
+	(*ArtifactVerificationOptions)(nil),                                // 3: dev.sigstore.verification.v1.ArtifactVerificationOptions
+	(*Artifact)(nil),                                                   // 4: dev.sigstore.verification.v1.Artifact
+	(*Input)(nil),                                                      // 5: dev.sigstore.verification.v1.Input
+	(*ArtifactVerificationOptions_TlogOptions)(nil),                    // 6: dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogOptions
+	(*ArtifactVerificationOptions_CtlogOptions)(nil),                   // 7: dev.sigstore.verification.v1.ArtifactVerificationOptions.CtlogOptions
+	(*ArtifactVerificationOptions_TimestampAuthorityOptions)(nil),      // 8: dev.sigstore.verification.v1.ArtifactVerificationOptions.TimestampAuthorityOptions
+	(*ArtifactVerificationOptions_TlogIntegratedTimestampOptions)(nil), // 9: dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogIntegratedTimestampOptions
+	(*ArtifactVerificationOptions_ObserverTimestampOptions)(nil),       // 10: dev.sigstore.verification.v1.ArtifactVerificationOptions.ObserverTimestampOptions
+	(*v1.SubjectAlternativeName)(nil),                                  // 11: dev.sigstore.common.v1.SubjectAlternativeName
+	(*v1.ObjectIdentifierValuePair)(nil),                               // 12: dev.sigstore.common.v1.ObjectIdentifierValuePair
+	(*v1.PublicKey)(nil),                                               // 13: dev.sigstore.common.v1.PublicKey
+	(*v11.TrustedRoot)(nil),                                            // 14: dev.sigstore.trustroot.v1.TrustedRoot
+	(*v12.Bundle)(nil),                                                 // 15: dev.sigstore.bundle.v1.Bundle
 }
 var file_sigstore_verification_proto_depIdxs = []int32{
-	9,  // 0: dev.sigstore.verification.v1.CertificateIdentity.san:type_name -> dev.sigstore.common.v1.SubjectAlternativeName
-	10, // 1: dev.sigstore.verification.v1.CertificateIdentity.oids:type_name -> dev.sigstore.common.v1.ObjectIdentifierValuePair
+	11, // 0: dev.sigstore.verification.v1.CertificateIdentity.san:type_name -> dev.sigstore.common.v1.SubjectAlternativeName
+	12, // 1: dev.sigstore.verification.v1.CertificateIdentity.oids:type_name -> dev.sigstore.common.v1.ObjectIdentifierValuePair
 	0,  // 2: dev.sigstore.verification.v1.CertificateIdentities.identities:type_name -> dev.sigstore.verification.v1.CertificateIdentity
-	11, // 3: dev.sigstore.verification.v1.PublicKeyIdentities.public_keys:type_name -> dev.sigstore.common.v1.PublicKey
+	13, // 3: dev.sigstore.verification.v1.PublicKeyIdentities.public_keys:type_name -> dev.sigstore.common.v1.PublicKey
 	1,  // 4: dev.sigstore.verification.v1.ArtifactVerificationOptions.certificate_identities:type_name -> dev.sigstore.verification.v1.CertificateIdentities
 	2,  // 5: dev.sigstore.verification.v1.ArtifactVerificationOptions.public_keys:type_name -> dev.sigstore.verification.v1.PublicKeyIdentities
 	6,  // 6: dev.sigstore.verification.v1.ArtifactVerificationOptions.tlog_options:type_name -> dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogOptions
 	7,  // 7: dev.sigstore.verification.v1.ArtifactVerificationOptions.ctlog_options:type_name -> dev.sigstore.verification.v1.ArtifactVerificationOptions.CtlogOptions
 	8,  // 8: dev.sigstore.verification.v1.ArtifactVerificationOptions.tsa_options:type_name -> dev.sigstore.verification.v1.ArtifactVerificationOptions.TimestampAuthorityOptions
-	12, // 9: dev.sigstore.verification.v1.Input.artifact_trust_root:type_name -> dev.sigstore.trustroot.v1.TrustedRoot
-	3,  // 10: dev.sigstore.verification.v1.Input.artifact_verification_options:type_name -> dev.sigstore.verification.v1.ArtifactVerificationOptions
-	13, // 11: dev.sigstore.verification.v1.Input.bundle:type_name -> dev.sigstore.bundle.v1.Bundle
-	4,  // 12: dev.sigstore.verification.v1.Input.artifact:type_name -> dev.sigstore.verification.v1.Artifact
-	13, // [13:13] is the sub-list for method output_type
-	13, // [13:13] is the sub-list for method input_type
-	13, // [13:13] is the sub-list for extension type_name
-	13, // [13:13] is the sub-list for extension extendee
-	0,  // [0:13] is the sub-list for field type_name
+	9,  // 9: dev.sigstore.verification.v1.ArtifactVerificationOptions.integrated_ts_options:type_name -> dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogIntegratedTimestampOptions
+	10, // 10: dev.sigstore.verification.v1.ArtifactVerificationOptions.observer_options:type_name -> dev.sigstore.verification.v1.ArtifactVerificationOptions.ObserverTimestampOptions
+	14, // 11: dev.sigstore.verification.v1.Input.artifact_trust_root:type_name -> dev.sigstore.trustroot.v1.TrustedRoot
+	3,  // 12: dev.sigstore.verification.v1.Input.artifact_verification_options:type_name -> dev.sigstore.verification.v1.ArtifactVerificationOptions
+	15, // 13: dev.sigstore.verification.v1.Input.bundle:type_name -> dev.sigstore.bundle.v1.Bundle
+	4,  // 14: dev.sigstore.verification.v1.Input.artifact:type_name -> dev.sigstore.verification.v1.Artifact
+	15, // [15:15] is the sub-list for method output_type
+	15, // [15:15] is the sub-list for method input_type
+	15, // [15:15] is the sub-list for extension type_name
+	15, // [15:15] is the sub-list for extension extendee
+	0,  // [0:15] is the sub-list for field type_name
 }
 
 func init() { file_sigstore_verification_proto_init() }
@@ -978,6 +1155,30 @@ func file_sigstore_verification_proto_init() {
 				return nil
 			}
 		}
+		file_sigstore_verification_proto_msgTypes[9].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ArtifactVerificationOptions_TlogIntegratedTimestampOptions); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_sigstore_verification_proto_msgTypes[10].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ArtifactVerificationOptions_ObserverTimestampOptions); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
 	}
 	file_sigstore_verification_proto_msgTypes[3].OneofWrappers = []interface{}{
 		(*ArtifactVerificationOptions_CertificateIdentities)(nil),
@@ -994,7 +1195,7 @@ func file_sigstore_verification_proto_init() {
 			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
 			RawDescriptor: file_sigstore_verification_proto_rawDesc,
 			NumEnums:      0,
-			NumMessages:   9,
+			NumMessages:   11,
 			NumExtensions: 0,
 			NumServices:   0,
 		},
diff --git a/gen/pb-python/sigstore_protobuf_specs/dev/sigstore/verification/v1/__init__.py b/gen/pb-python/sigstore_protobuf_specs/dev/sigstore/verification/v1/__init__.py
index 81344696..ffebc310 100644
--- a/gen/pb-python/sigstore_protobuf_specs/dev/sigstore/verification/v1/__init__.py
+++ b/gen/pb-python/sigstore_protobuf_specs/dev/sigstore/verification/v1/__init__.py
@@ -83,7 +83,23 @@ class ArtifactVerificationOptions(betterproto.Message):
     )
     """
     Optional options for certificate signed timestamp verification. If none is
-    provided, the default verification options are: Threshold: 1 Disable: false
+    provided, the default verification options are: Threshold: 0 Disable: true
+    """
+
+    integrated_ts_options: Optional[
+        "ArtifactVerificationOptionsTlogIntegratedTimestampOptions"
+    ] = betterproto.message_field(6, optional=True, group="_integrated_ts_options")
+    """
+    Optional options for integrated timestamp verification. If none is
+    provided, the default verification options are: Threshold: 0 Disable: true
+    """
+
+    observer_options: Optional[
+        "ArtifactVerificationOptionsObserverTimestampOptions"
+    ] = betterproto.message_field(7, optional=True, group="_observer_options")
+    """
+    Optional options for observed timestamp verification. If none is provided,
+    the default verification options are: Threshold 1 Disable: false
     """
 
 
@@ -117,6 +133,28 @@ class ArtifactVerificationOptionsTimestampAuthorityOptions(betterproto.Message):
     """Disable signed timestamp verification."""
 
 
+@dataclass(eq=False, repr=False)
+class ArtifactVerificationOptionsTlogIntegratedTimestampOptions(betterproto.Message):
+    threshold: int = betterproto.int32_field(1)
+    """The number of integrated timestamps that are expected."""
+
+    disable: bool = betterproto.bool_field(2)
+    """Disable integrated timestamp verification."""
+
+
+@dataclass(eq=False, repr=False)
+class ArtifactVerificationOptionsObserverTimestampOptions(betterproto.Message):
+    threshold: int = betterproto.int32_field(1)
+    """
+    The number of external observers of the timestamp. This is a union of
+    RFC3161 signed timestamps, and integrated timestamps from a transparency
+    log, that could include additional timestamp sources in the future.
+    """
+
+    disable: bool = betterproto.bool_field(2)
+    """Disable observer timestamp verification."""
+
+
 @dataclass(eq=False, repr=False)
 class Artifact(betterproto.Message):
     artifact_uri: str = betterproto.string_field(1, group="data")
diff --git a/gen/pb-ruby/lib/sigstore_verification_pb.rb b/gen/pb-ruby/lib/sigstore_verification_pb.rb
index 5d92821e..56a88150 100644
--- a/gen/pb-ruby/lib/sigstore_verification_pb.rb
+++ b/gen/pb-ruby/lib/sigstore_verification_pb.rb
@@ -24,6 +24,8 @@
       proto3_optional :tlog_options, :message, 3, "dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogOptions"
       proto3_optional :ctlog_options, :message, 4, "dev.sigstore.verification.v1.ArtifactVerificationOptions.CtlogOptions"
       proto3_optional :tsa_options, :message, 5, "dev.sigstore.verification.v1.ArtifactVerificationOptions.TimestampAuthorityOptions"
+      proto3_optional :integrated_ts_options, :message, 6, "dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogIntegratedTimestampOptions"
+      proto3_optional :observer_options, :message, 7, "dev.sigstore.verification.v1.ArtifactVerificationOptions.ObserverTimestampOptions"
       oneof :signers do
         optional :certificate_identities, :message, 1, "dev.sigstore.verification.v1.CertificateIdentities"
         optional :public_keys, :message, 2, "dev.sigstore.verification.v1.PublicKeyIdentities"
@@ -42,6 +44,14 @@
       optional :threshold, :int32, 1
       optional :disable, :bool, 2
     end
+    add_message "dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogIntegratedTimestampOptions" do
+      optional :threshold, :int32, 1
+      optional :disable, :bool, 2
+    end
+    add_message "dev.sigstore.verification.v1.ArtifactVerificationOptions.ObserverTimestampOptions" do
+      optional :threshold, :int32, 1
+      optional :disable, :bool, 2
+    end
     add_message "dev.sigstore.verification.v1.Artifact" do
       oneof :data do
         optional :artifact_uri, :string, 1
@@ -67,6 +77,8 @@ module V1
       ArtifactVerificationOptions::TlogOptions = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogOptions").msgclass
       ArtifactVerificationOptions::CtlogOptions = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("dev.sigstore.verification.v1.ArtifactVerificationOptions.CtlogOptions").msgclass
       ArtifactVerificationOptions::TimestampAuthorityOptions = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("dev.sigstore.verification.v1.ArtifactVerificationOptions.TimestampAuthorityOptions").msgclass
+      ArtifactVerificationOptions::TlogIntegratedTimestampOptions = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogIntegratedTimestampOptions").msgclass
+      ArtifactVerificationOptions::ObserverTimestampOptions = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("dev.sigstore.verification.v1.ArtifactVerificationOptions.ObserverTimestampOptions").msgclass
       Artifact = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("dev.sigstore.verification.v1.Artifact").msgclass
       Input = ::Google::Protobuf::DescriptorPool.generated_pool.lookup("dev.sigstore.verification.v1.Input").msgclass
     end
diff --git a/gen/pb-rust/schemas/ArtifactVerificationOptions.schema.json b/gen/pb-rust/schemas/ArtifactVerificationOptions.schema.json
index a67d26f5..a36bcb98 100644
--- a/gen/pb-rust/schemas/ArtifactVerificationOptions.schema.json
+++ b/gen/pb-rust/schemas/ArtifactVerificationOptions.schema.json
@@ -26,7 +26,17 @@
                 "tsaOptions": {
                     "$ref": "#/definitions/dev.sigstore.verification.v1.ArtifactVerificationOptions.TimestampAuthorityOptions",
                     "additionalProperties": false,
-                    "description": "Optional options for certificate signed timestamp verification. If none is provided, the default verification options are: Threshold: 1 Disable: false"
+                    "description": "Optional options for certificate signed timestamp verification. If none is provided, the default verification options are: Threshold: 0 Disable: true"
+                },
+                "integratedTsOptions": {
+                    "$ref": "#/definitions/dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogIntegratedTimestampOptions",
+                    "additionalProperties": false,
+                    "description": "Optional options for integrated timestamp verification. If none is provided, the default verification options are: Threshold: 0 Disable: true"
+                },
+                "observerOptions": {
+                    "$ref": "#/definitions/dev.sigstore.verification.v1.ArtifactVerificationOptions.ObserverTimestampOptions",
+                    "additionalProperties": false,
+                    "description": "Optional options for observed timestamp verification. If none is provided, the default verification options are: Threshold 1 Disable: false"
                 }
             },
             "additionalProperties": false,
@@ -56,6 +66,16 @@
                     "required": [
                         "tsa_options"
                     ]
+                },
+                {
+                    "required": [
+                        "integrated_ts_options"
+                    ]
+                },
+                {
+                    "required": [
+                        "observer_options"
+                    ]
                 }
             ],
             "title": "Artifact Verification Options",
@@ -212,6 +232,21 @@
             "type": "object",
             "title": "Ctlog Options"
         },
+        "dev.sigstore.verification.v1.ArtifactVerificationOptions.ObserverTimestampOptions": {
+            "properties": {
+                "threshold": {
+                    "type": "integer",
+                    "description": "The number of external observers of the timestamp. This is a union of RFC3161 signed timestamps, and integrated timestamps from a transparency log, that could include additional timestamp sources in the future."
+                },
+                "disable": {
+                    "type": "boolean",
+                    "description": "Disable observer timestamp verification."
+                }
+            },
+            "additionalProperties": false,
+            "type": "object",
+            "title": "Observer Timestamp Options"
+        },
         "dev.sigstore.verification.v1.ArtifactVerificationOptions.TimestampAuthorityOptions": {
             "properties": {
                 "threshold": {
@@ -227,6 +262,21 @@
             "type": "object",
             "title": "Timestamp Authority Options"
         },
+        "dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogIntegratedTimestampOptions": {
+            "properties": {
+                "threshold": {
+                    "type": "integer",
+                    "description": "The number of integrated timestamps that are expected."
+                },
+                "disable": {
+                    "type": "boolean",
+                    "description": "Disable integrated timestamp verification."
+                }
+            },
+            "additionalProperties": false,
+            "type": "object",
+            "title": "Tlog Integrated Timestamp Options"
+        },
         "dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogOptions": {
             "properties": {
                 "threshold": {
diff --git a/gen/pb-rust/schemas/Input.schema.json b/gen/pb-rust/schemas/Input.schema.json
index b5fe5060..83a625e6 100644
--- a/gen/pb-rust/schemas/Input.schema.json
+++ b/gen/pb-rust/schemas/Input.schema.json
@@ -662,7 +662,17 @@
                 "tsaOptions": {
                     "$ref": "#/definitions/dev.sigstore.verification.v1.ArtifactVerificationOptions.TimestampAuthorityOptions",
                     "additionalProperties": false,
-                    "description": "Optional options for certificate signed timestamp verification. If none is provided, the default verification options are: Threshold: 1 Disable: false"
+                    "description": "Optional options for certificate signed timestamp verification. If none is provided, the default verification options are: Threshold: 0 Disable: true"
+                },
+                "integratedTsOptions": {
+                    "$ref": "#/definitions/dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogIntegratedTimestampOptions",
+                    "additionalProperties": false,
+                    "description": "Optional options for integrated timestamp verification. If none is provided, the default verification options are: Threshold: 0 Disable: true"
+                },
+                "observerOptions": {
+                    "$ref": "#/definitions/dev.sigstore.verification.v1.ArtifactVerificationOptions.ObserverTimestampOptions",
+                    "additionalProperties": false,
+                    "description": "Optional options for observed timestamp verification. If none is provided, the default verification options are: Threshold 1 Disable: false"
                 }
             },
             "additionalProperties": false,
@@ -692,6 +702,16 @@
                     "required": [
                         "tsa_options"
                     ]
+                },
+                {
+                    "required": [
+                        "integrated_ts_options"
+                    ]
+                },
+                {
+                    "required": [
+                        "observer_options"
+                    ]
                 }
             ],
             "title": "Artifact Verification Options",
@@ -712,6 +732,21 @@
             "type": "object",
             "title": "Ctlog Options"
         },
+        "dev.sigstore.verification.v1.ArtifactVerificationOptions.ObserverTimestampOptions": {
+            "properties": {
+                "threshold": {
+                    "type": "integer",
+                    "description": "The number of external observers of the timestamp. This is a union of RFC3161 signed timestamps, and integrated timestamps from a transparency log, that could include additional timestamp sources in the future."
+                },
+                "disable": {
+                    "type": "boolean",
+                    "description": "Disable observer timestamp verification."
+                }
+            },
+            "additionalProperties": false,
+            "type": "object",
+            "title": "Observer Timestamp Options"
+        },
         "dev.sigstore.verification.v1.ArtifactVerificationOptions.TimestampAuthorityOptions": {
             "properties": {
                 "threshold": {
@@ -727,6 +762,21 @@
             "type": "object",
             "title": "Timestamp Authority Options"
         },
+        "dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogIntegratedTimestampOptions": {
+            "properties": {
+                "threshold": {
+                    "type": "integer",
+                    "description": "The number of integrated timestamps that are expected."
+                },
+                "disable": {
+                    "type": "boolean",
+                    "description": "Disable integrated timestamp verification."
+                }
+            },
+            "additionalProperties": false,
+            "type": "object",
+            "title": "Tlog Integrated Timestamp Options"
+        },
         "dev.sigstore.verification.v1.ArtifactVerificationOptions.TlogOptions": {
             "properties": {
                 "threshold": {
diff --git a/gen/pb-typescript/src/__generated__/sigstore_verification.ts b/gen/pb-typescript/src/__generated__/sigstore_verification.ts
index c9110ccd..b7620398 100644
--- a/gen/pb-typescript/src/__generated__/sigstore_verification.ts
+++ b/gen/pb-typescript/src/__generated__/sigstore_verification.ts
@@ -56,10 +56,28 @@ export interface ArtifactVerificationOptions {
   /**
    * Optional options for certificate signed timestamp verification.
    * If none is provided, the default verification options are:
-   * Threshold: 1
+   * Threshold: 0
+   * Disable: true
+   */
+  tsaOptions?:
+    | ArtifactVerificationOptions_TimestampAuthorityOptions
+    | undefined;
+  /**
+   * Optional options for integrated timestamp verification.
+   * If none is provided, the default verification options are:
+   * Threshold: 0
+   * Disable: true
+   */
+  integratedTsOptions?:
+    | ArtifactVerificationOptions_TlogIntegratedTimestampOptions
+    | undefined;
+  /**
+   * Optional options for observed timestamp verification.
+   * If none is provided, the default verification options are:
+   * Threshold 1
    * Disable: false
    */
-  tsaOptions?: ArtifactVerificationOptions_TimestampAuthorityOptions | undefined;
+  observerOptions?: ArtifactVerificationOptions_ObserverTimestampOptions | undefined;
 }
 
 export interface ArtifactVerificationOptions_TlogOptions {
@@ -88,6 +106,26 @@ export interface ArtifactVerificationOptions_TimestampAuthorityOptions {
   disable: boolean;
 }
 
+export interface ArtifactVerificationOptions_TlogIntegratedTimestampOptions {
+  /** The number of integrated timestamps that are expected. */
+  threshold: number;
+  /** Disable integrated timestamp verification. */
+  disable: boolean;
+}
+
+export interface ArtifactVerificationOptions_ObserverTimestampOptions {
+  /**
+   * The number of external observers of the timestamp.
+   * This is a union of RFC3161 signed timestamps, and
+   * integrated timestamps from a transparency log, that
+   * could include additional timestamp sources in the
+   * future.
+   */
+  threshold: number;
+  /** Disable observer timestamp verification. */
+  disable: boolean;
+}
+
 export interface Artifact {
   data?: { $case: "artifactUri"; artifactUri: string } | { $case: "artifact"; artifact: Buffer };
 }
@@ -192,7 +230,14 @@ export const PublicKeyIdentities = {
 };
 
 function createBaseArtifactVerificationOptions(): ArtifactVerificationOptions {
-  return { signers: undefined, tlogOptions: undefined, ctlogOptions: undefined, tsaOptions: undefined };
+  return {
+    signers: undefined,
+    tlogOptions: undefined,
+    ctlogOptions: undefined,
+    tsaOptions: undefined,
+    integratedTsOptions: undefined,
+    observerOptions: undefined,
+  };
 }
 
 export const ArtifactVerificationOptions = {
@@ -215,6 +260,12 @@ export const ArtifactVerificationOptions = {
       tsaOptions: isSet(object.tsaOptions)
         ? ArtifactVerificationOptions_TimestampAuthorityOptions.fromJSON(object.tsaOptions)
         : undefined,
+      integratedTsOptions: isSet(object.integratedTsOptions)
+        ? ArtifactVerificationOptions_TlogIntegratedTimestampOptions.fromJSON(object.integratedTsOptions)
+        : undefined,
+      observerOptions: isSet(object.observerOptions)
+        ? ArtifactVerificationOptions_ObserverTimestampOptions.fromJSON(object.observerOptions)
+        : undefined,
     };
   },
 
@@ -236,6 +287,12 @@ export const ArtifactVerificationOptions = {
     message.tsaOptions !== undefined && (obj.tsaOptions = message.tsaOptions
       ? ArtifactVerificationOptions_TimestampAuthorityOptions.toJSON(message.tsaOptions)
       : undefined);
+    message.integratedTsOptions !== undefined && (obj.integratedTsOptions = message.integratedTsOptions
+      ? ArtifactVerificationOptions_TlogIntegratedTimestampOptions.toJSON(message.integratedTsOptions)
+      : undefined);
+    message.observerOptions !== undefined && (obj.observerOptions = message.observerOptions
+      ? ArtifactVerificationOptions_ObserverTimestampOptions.toJSON(message.observerOptions)
+      : undefined);
     return obj;
   },
 };
@@ -305,6 +362,46 @@ export const ArtifactVerificationOptions_TimestampAuthorityOptions = {
   },
 };
 
+function createBaseArtifactVerificationOptions_TlogIntegratedTimestampOptions(): ArtifactVerificationOptions_TlogIntegratedTimestampOptions {
+  return { threshold: 0, disable: false };
+}
+
+export const ArtifactVerificationOptions_TlogIntegratedTimestampOptions = {
+  fromJSON(object: any): ArtifactVerificationOptions_TlogIntegratedTimestampOptions {
+    return {
+      threshold: isSet(object.threshold) ? Number(object.threshold) : 0,
+      disable: isSet(object.disable) ? Boolean(object.disable) : false,
+    };
+  },
+
+  toJSON(message: ArtifactVerificationOptions_TlogIntegratedTimestampOptions): unknown {
+    const obj: any = {};
+    message.threshold !== undefined && (obj.threshold = Math.round(message.threshold));
+    message.disable !== undefined && (obj.disable = message.disable);
+    return obj;
+  },
+};
+
+function createBaseArtifactVerificationOptions_ObserverTimestampOptions(): ArtifactVerificationOptions_ObserverTimestampOptions {
+  return { threshold: 0, disable: false };
+}
+
+export const ArtifactVerificationOptions_ObserverTimestampOptions = {
+  fromJSON(object: any): ArtifactVerificationOptions_ObserverTimestampOptions {
+    return {
+      threshold: isSet(object.threshold) ? Number(object.threshold) : 0,
+      disable: isSet(object.disable) ? Boolean(object.disable) : false,
+    };
+  },
+
+  toJSON(message: ArtifactVerificationOptions_ObserverTimestampOptions): unknown {
+    const obj: any = {};
+    message.threshold !== undefined && (obj.threshold = Math.round(message.threshold));
+    message.disable !== undefined && (obj.disable = message.disable);
+    return obj;
+  },
+};
+
 function createBaseArtifact(): Artifact {
   return { data: undefined };
 }
diff --git a/protos/sigstore_verification.proto b/protos/sigstore_verification.proto
index 7233365f..7f811dd2 100644
--- a/protos/sigstore_verification.proto
+++ b/protos/sigstore_verification.proto
@@ -69,6 +69,22 @@ message ArtifactVerificationOptions {
                 // Disable signed timestamp verification.
                 bool disable = 2;
         }
+        message TlogIntegratedTimestampOptions{
+                // The number of integrated timestamps that are expected.
+                int32 threshold = 1;
+                // Disable integrated timestamp verification.
+                bool disable = 2;
+        }
+        message ObserverTimestampOptions {
+                // The number of external observers of the timestamp.
+                // This is a union of RFC3161 signed timestamps, and
+                // integrated timestamps from a transparency log, that
+                // could include additional timestamp sources in the
+                // future.
+                int32 threshold = 1;
+                // Disable observer timestamp verification.
+                bool disable = 2;
+        }
 
         // At least one identity MUST be provided. Providing zero identities
         // is an error. If at least one provided identity is found as a
@@ -99,9 +115,19 @@ message ArtifactVerificationOptions {
         optional CtlogOptions ctlog_options = 4;
         // Optional options for certificate signed timestamp verification.
         // If none is provided, the default verification options are:
-        // Threshold: 1
-        // Disable: false
+        // Threshold: 0
+        // Disable: true
         optional TimestampAuthorityOptions tsa_options = 5;
+        // Optional options for integrated timestamp verification.
+        // If none is provided, the default verification options are:
+        // Threshold: 0
+        // Disable: true
+        optional TlogIntegratedTimestampOptions integrated_ts_options = 6;
+        // Optional options for observed timestamp verification.
+        // If none is provided, the default verification options are:
+        // Threshold 1
+        // Disable: false
+        optional ObserverTimestampOptions observer_options = 7;
 }
 
 message Artifact {