I went to my music library, and I already had some uploaded 🫪

Have you published any 36787 events? I know another user saw some they had uploaded too.

Probably when I did some blossom tests for mp3 playback into Nostr Vault

That's likely it 🤝 A surprise for me was how many mp3 were already out there. I had a handful of "file already exists" doing uploads.