I was used https://hitrecord.org/ to collaborate with other artists. I am not sure if this site would work well using Nostr as protocol. I had someone use my lyrics once and turn it into a song. I thought that was super cool, and I believe some of my photography was used for a video or something. It was a long time ago, but there was so much there to play with. Random thought. Anyhoo, I am going to bed. I love you, my Nostr Elite xo