diff --git a/object_store/src/aws/client.rs b/object_store/src/aws/client.rs
index 6f6b932d6ff5..6307d7f3be78 100644
--- a/object_store/src/aws/client.rs
+++ b/object_store/src/aws/client.rs
@@ -27,7 +27,10 @@ use crate::client::header::{get_etag, HeaderConfig};
 use crate::client::header::{get_put_result, get_version};
 use crate::client::list::ListClient;
 use crate::client::retry::RetryExt;
-use crate::client::s3::{CompleteMultipartUpload, CompleteMultipartUploadResult, CopyPartResult, InitiateMultipartUploadResult, ListResponse, MultipartPart};
+use crate::client::s3::{
+    CompleteMultipartUpload, CompleteMultipartUploadResult, CopyPartResult,
+    InitiateMultipartUploadResult, ListResponse, MultipartPart,
+};
 use crate::client::GetOptionsExt;
 use crate::path::DELIMITER;
 use crate::{
@@ -660,7 +663,6 @@ impl S3Client {
             .request_with_config(Method::PUT, path, &config)
             .query(&[("partNumber", &part), ("uploadId", upload_id)])
             .idempotent(true);
-        let checksum_sha256 = request.payload_sha256.map(|digest| digest.as_ref().into());
 
         request = match data {
             PutPartPayload::Part(payload) => request.with_payload(payload),
@@ -680,6 +682,11 @@ impl S3Client {
             request = request.with_encryption_headers();
         }
         let response = request.send().await?;
+        let checksum_sha256 = response
+            .headers()
+            .get("x-amz-checksum-sha256")
+            .map(|v| v.to_str().unwrap().to_string());
+        println!("response={response:#?}");
 
         let content_id = match is_copy {
             false => get_etag(response.headers()).context(MetadataSnafu)?,
diff --git a/object_store/src/aws/mod.rs b/object_store/src/aws/mod.rs
index 13d3a54b1853..0ee77d66143d 100644
--- a/object_store/src/aws/mod.rs
+++ b/object_store/src/aws/mod.rs
@@ -40,7 +40,7 @@ use crate::aws::client::{CompleteMultipartMode, PutPartPayload, RequestError, S3
 use crate::client::get::GetClientExt;
 use crate::client::list::ListClientExt;
 use crate::client::CredentialProvider;
-use crate::multipart::{MultipartStore};
+use crate::multipart::MultipartStore;
 use crate::signer::Signer;
 use crate::util::STRICT_ENCODE_SET;
 use crate::{
@@ -74,8 +74,8 @@ const STORE: &str = "S3";
 /// [`CredentialProvider`] for [`AmazonS3`]
 pub type AwsCredentialProvider = Arc<dyn CredentialProvider<Credential = AwsCredential>>;
 use crate::client::parts::Parts;
-pub use credential::{AwsAuthorizer, AwsCredential};
 use crate::client::s3::MultipartPart;
+pub use credential::{AwsAuthorizer, AwsCredential};
 
 /// Interface for [Amazon S3](https://aws.amazon.com/s3/).
 #[derive(Debug, Clone)]
diff --git a/object_store/src/azure/client.rs b/object_store/src/azure/client.rs
index 23edd6e4fdb1..31ca28d55acd 100644
--- a/object_store/src/azure/client.rs
+++ b/object_store/src/azure/client.rs
@@ -22,6 +22,7 @@ use crate::client::get::GetClient;
 use crate::client::header::{get_put_result, HeaderConfig};
 use crate::client::list::ListClient;
 use crate::client::retry::RetryExt;
+use crate::client::s3::MultipartPart;
 use crate::client::GetOptionsExt;
 use crate::multipart::PartId;
 use crate::path::DELIMITER;
@@ -46,7 +47,6 @@ use std::collections::HashMap;
 use std::sync::Arc;
 use std::time::Duration;
 use url::Url;
-use crate::client::s3::MultipartPart;
 
 const VERSION_HEADER: &str = "x-ms-version-id";
 const USER_DEFINED_METADATA_HEADER_PREFIX: &str = "x-ms-meta-";
diff --git a/object_store/src/azure/mod.rs b/object_store/src/azure/mod.rs
index 2b3cd7b13355..fd42f1ce75d2 100644
--- a/object_store/src/azure/mod.rs
+++ b/object_store/src/azure/mod.rs
@@ -23,11 +23,9 @@
 //!
 //! Unused blocks will automatically be dropped after 7 days.
 use crate::{
-    multipart::{MultipartStore},
-    path::Path,
-    signer::Signer,
-    GetOptions, GetResult, ListResult, MultipartId, MultipartUpload, ObjectMeta, ObjectStore,
-    PutMultipartOpts, PutOptions, PutPayload, PutResult, Result, UploadPart,
+    multipart::MultipartStore, path::Path, signer::Signer, GetOptions, GetResult, ListResult,
+    MultipartId, MultipartUpload, ObjectMeta, ObjectStore, PutMultipartOpts, PutOptions,
+    PutPayload, PutResult, Result, UploadPart,
 };
 use async_trait::async_trait;
 use futures::stream::{BoxStream, StreamExt, TryStreamExt};
@@ -50,9 +48,9 @@ mod credential;
 pub type AzureCredentialProvider = Arc<dyn CredentialProvider<Credential = AzureCredential>>;
 use crate::azure::client::AzureClient;
 use crate::client::parts::Parts;
+use crate::client::s3::MultipartPart;
 pub use builder::{AzureConfigKey, MicrosoftAzureBuilder};
 pub use credential::AzureCredential;
-use crate::client::s3::MultipartPart;
 
 const STORE: &str = "MicrosoftAzure";
 
diff --git a/object_store/src/client/parts.rs b/object_store/src/client/parts.rs
index c0895d9446a0..d41db959cbf5 100644
--- a/object_store/src/client/parts.rs
+++ b/object_store/src/client/parts.rs
@@ -15,8 +15,8 @@
 // specific language governing permissions and limitations
 // under the License.
 
-use parking_lot::Mutex;
 use crate::client::s3::MultipartPart;
+use parking_lot::Mutex;
 
 /// An interior mutable collection of upload parts and their corresponding part index
 #[derive(Debug, Default)]
diff --git a/object_store/src/client/s3.rs b/object_store/src/client/s3.rs
index 5bfa20d4897d..c69f048fc532 100644
--- a/object_store/src/client/s3.rs
+++ b/object_store/src/client/s3.rs
@@ -143,7 +143,7 @@ pub struct MultipartPart {
     #[serde(rename = "PartNumber")]
     pub part_number: usize,
     #[serde(rename = "ChecksumSHA256")]
-    pub checksum_sha256: Option<Vec<u8>>,
+    pub checksum_sha256: Option<String>,
 }
 
 #[derive(Debug, Deserialize)]
diff --git a/object_store/src/gcp/client.rs b/object_store/src/gcp/client.rs
index 403eaf39c7b7..58a04ddaab48 100644
--- a/object_store/src/gcp/client.rs
+++ b/object_store/src/gcp/client.rs
@@ -19,7 +19,10 @@ use crate::client::get::GetClient;
 use crate::client::header::{get_put_result, get_version, HeaderConfig};
 use crate::client::list::ListClient;
 use crate::client::retry::RetryExt;
-use crate::client::s3::{CompleteMultipartUpload, CompleteMultipartUploadResult, InitiateMultipartUploadResult, ListResponse, MultipartPart};
+use crate::client::s3::{
+    CompleteMultipartUpload, CompleteMultipartUploadResult, InitiateMultipartUploadResult,
+    ListResponse, MultipartPart,
+};
 use crate::client::GetOptionsExt;
 use crate::gcp::{GcpCredential, GcpCredentialProvider, GcpSigningCredentialProvider, STORE};
 use crate::multipart::PartId;
diff --git a/object_store/src/gcp/mod.rs b/object_store/src/gcp/mod.rs
index e2732238e3e4..f75f99d62009 100644
--- a/object_store/src/gcp/mod.rs
+++ b/object_store/src/gcp/mod.rs
@@ -41,9 +41,8 @@ use crate::client::CredentialProvider;
 use crate::gcp::credential::GCSAuthorizer;
 use crate::signer::Signer;
 use crate::{
-    path::Path, GetOptions, GetResult, ListResult, MultipartId, MultipartUpload,
-    ObjectMeta, ObjectStore, PutMultipartOpts, PutOptions, PutPayload, PutResult, Result,
-    UploadPart,
+    path::Path, GetOptions, GetResult, ListResult, MultipartId, MultipartUpload, ObjectMeta,
+    ObjectStore, PutMultipartOpts, PutOptions, PutPayload, PutResult, Result, UploadPart,
 };
 use async_trait::async_trait;
 use client::GoogleCloudStorageClient;
@@ -54,10 +53,10 @@ use url::Url;
 use crate::client::get::GetClientExt;
 use crate::client::list::ListClientExt;
 use crate::client::parts::Parts;
+use crate::client::s3::MultipartPart;
 use crate::multipart::MultipartStore;
 pub use builder::{GoogleCloudStorageBuilder, GoogleConfigKey};
 pub use credential::{GcpCredential, GcpSigningCredential, ServiceAccountKey};
-use crate::client::s3::MultipartPart;
 
 mod builder;
 mod client;
diff --git a/object_store/src/memory.rs b/object_store/src/memory.rs
index f383ec35813f..eb995c4df209 100644
--- a/object_store/src/memory.rs
+++ b/object_store/src/memory.rs
@@ -27,7 +27,8 @@ use futures::{stream::BoxStream, StreamExt};
 use parking_lot::RwLock;
 use snafu::{OptionExt, ResultExt, Snafu};
 
-use crate::multipart::{MultipartStore};
+use crate::client::s3::MultipartPart;
+use crate::multipart::MultipartStore;
 use crate::util::InvalidGetRange;
 use crate::{
     path::Path, Attributes, GetRange, GetResult, GetResultPayload, ListResult, MultipartId,
@@ -35,7 +36,6 @@ use crate::{
     Result, UpdateVersion, UploadPart,
 };
 use crate::{GetOptions, PutPayload};
-use crate::client::s3::MultipartPart;
 
 /// A specialized `Error` for in-memory object store-related errors
 #[derive(Debug, Snafu)]
diff --git a/object_store/src/multipart.rs b/object_store/src/multipart.rs
index 436d310ca0ce..e52daf2c7b9b 100644
--- a/object_store/src/multipart.rs
+++ b/object_store/src/multipart.rs
@@ -23,9 +23,9 @@
 
 use async_trait::async_trait;
 
+use crate::client::s3::MultipartPart;
 use crate::path::Path;
 use crate::{MultipartId, PutPayload, PutResult, Result};
-use crate::client::s3::MultipartPart;
 
 /// Represents a part of a file that has been successfully uploaded in a multipart upload process.
 #[derive(Debug, Clone)]
@@ -36,7 +36,9 @@ pub struct PartId {
 
 impl From<MultipartPart> for PartId {
     fn from(value: MultipartPart) -> Self {
-        PartId { content_id: value.e_tag.clone() }
+        PartId {
+            content_id: value.e_tag.clone(),
+        }
     }
 }
 
diff --git a/object_store/src/throttle.rs b/object_store/src/throttle.rs
index 3f3aff48aded..5b2b218ce8de 100644
--- a/object_store/src/throttle.rs
+++ b/object_store/src/throttle.rs
@@ -20,7 +20,8 @@ use parking_lot::Mutex;
 use std::ops::Range;
 use std::{convert::TryInto, sync::Arc};
 
-use crate::multipart::{MultipartStore};
+use crate::client::s3::MultipartPart;
+use crate::multipart::MultipartStore;
 use crate::{
     path::Path, GetResult, GetResultPayload, ListResult, MultipartId, MultipartUpload, ObjectMeta,
     ObjectStore, PutMultipartOpts, PutOptions, PutPayload, PutResult, Result,
@@ -30,7 +31,6 @@ use async_trait::async_trait;
 use bytes::Bytes;
 use futures::{stream::BoxStream, FutureExt, StreamExt};
 use std::time::Duration;
-use crate::client::s3::MultipartPart;
 
 /// Configuration settings for throttled store
 #[derive(Debug, Default, Clone, Copy)]