One thing that just came to mind is a blobstr service is one that monitors these hashes and automatically mirrors them from your notes. You wouldn’t need any of the blossom machinery and would be more automated. I guess the blossom list thing would still be useful if you want to advertise which blobstr relays you use.

The only additional thing blobstr needs is authenticated uploads for uploading files. This could just be an api key and doesn’t need to involve nostr at all.

Maybe this is the same or very similar to blossom?