diff --git a/data/registry_model/interface.py b/data/registry_model/interface.py
index 7214d8e06..6084b3395 100644
--- a/data/registry_model/interface.py
+++ b/data/registry_model/interface.py
@@ -225,3 +225,8 @@ class RegistryDataInterface(object):
   @abstractmethod
   def delete_blob_upload(self, blob_upload):
     """ Deletes a blob upload record. """
+
+  @abstractmethod
+  def commit_blob_upload(self, blob_upload, blob_digest_str, blob_expiration_seconds):
+    """ Commits the blob upload into a blob and sets an expiration before that blob will be GCed.
+    """
diff --git a/data/registry_model/registry_pre_oci_model.py b/data/registry_model/registry_pre_oci_model.py
index 9f3c5c67e..f2bd6cf38 100644
--- a/data/registry_model/registry_pre_oci_model.py
+++ b/data/registry_model/registry_pre_oci_model.py
@@ -624,5 +624,27 @@ class PreOCIModel(RegistryDataInterface):
     if upload_record is not None:
       upload_record.delete_instance()
 
+  def commit_blob_upload(self, blob_upload, blob_digest_str, blob_expiration_seconds):
+    """ Commits the blob upload into a blob and sets an expiration before that blob will be GCed.
+    """
+    upload_record = model.blob.get_blob_upload_by_uuid(blob_upload.upload_id)
+    if upload_record is None:
+      return None
+
+    repository = upload_record.repository
+    namespace_name = repository.namespace_user.username
+    repo_name = repository.name
+
+    # Create the blob and temporarily tag it.
+    location_obj = model.storage.get_image_location_for_name(blob_upload.location_name)
+    blob_record = model.blob.store_blob_record_and_temp_link(
+      namespace_name, repo_name, blob_digest_str, location_obj.id, blob_upload.byte_count,
+      blob_expiration_seconds, blob_upload.uncompressed_byte_count)
+
+    # Delete the blob upload.
+    upload_record.delete_instance()
+    return Blob.for_image_storage(blob_record,
+                                  storage_path=model.storage.get_layer_path(blob_record))
+
 
 pre_oci_model = PreOCIModel()
diff --git a/data/registry_model/test/test_pre_oci_model.py b/data/registry_model/test/test_pre_oci_model.py
index 3c2c9adbb..cdeec9f45 100644
--- a/data/registry_model/test/test_pre_oci_model.py
+++ b/data/registry_model/test/test_pre_oci_model.py
@@ -1,3 +1,6 @@
+import hashlib
+import uuid
+
 from datetime import datetime, timedelta
 
 import pytest
@@ -530,7 +533,8 @@ def test_torrent_info(pre_oci_model):
 def test_blob_uploads(pre_oci_model):
   repository_ref = pre_oci_model.lookup_repository('devtable', 'simple')
 
-  blob_upload = pre_oci_model.create_blob_upload(repository_ref, 'local_us', {'some': 'metadata'})
+  blob_upload = pre_oci_model.create_blob_upload(repository_ref, str(uuid.uuid4()),
+                                                 'local_us', {'some': 'metadata'})
   assert blob_upload
   assert blob_upload.storage_metadata == {'some': 'metadata'}
   assert blob_upload.location_name == 'local_us'
@@ -557,3 +561,17 @@ def test_blob_uploads(pre_oci_model):
 
   # Ensure it can no longer be found.
   assert not pre_oci_model.lookup_blob_upload(repository_ref, blob_upload.upload_id)
+
+
+def test_commit_blob_upload(pre_oci_model):
+  repository_ref = pre_oci_model.lookup_repository('devtable', 'simple')
+  blob_upload = pre_oci_model.create_blob_upload(repository_ref, str(uuid.uuid4()),
+                                                 'local_us', {'some': 'metadata'})
+
+  # Commit the blob upload and make sure it is written as a blob.
+  digest = 'sha256:' + hashlib.sha256('hello').hexdigest()
+  blob = pre_oci_model.commit_blob_upload(blob_upload, digest, 60)
+  assert blob.digest == digest
+
+  # Ensure the upload can no longer be found.
+  assert not pre_oci_model.lookup_blob_upload(repository_ref, blob_upload.upload_id)