Hello,
I am afraid we do not keep an MD5 sum of the original file.
You can always download it using the getUrl() method after it finished uploading and run a checksum but of course, for big files, this is not really a reasonable approach.
However, if the file was not fully uploaded to the server, chances are the conversions to the various flavours would fail so, if all flavours are in status 2 [READY], it is pretty safe to assume ingestion was successful.