When uploading to blob storage the Content-MD5 property can be set. This happens automatically when using the portal or AzCopy. The Content-Md5 is an MD5 hash of the blob content. This hash is used to verify the integrity of the blob during transport. When this header is specified, the storage service checks the hash that has arrived with the one that was sent. If the two hashes do not match, the operation will fail with error code 400 (Bad Request).
Hope this helps. Let me know if you have further questions or run into any issues.
-------------------------------
Please don’t forget to "Accept the answer" and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.