Awesome stuff Ben.
Adding to Steem, Muse might interest you. We currently have multiple people working on different fronts in order to solve most of the problems in music. (Not tackling AI though)

We are updating our smart contracts at the moment in order to be as flexible as possible for multiple types of edge cases.
We have 2 front ends releasing in Q1, 1 for the artist to upload his metadata and 1 for the music consumer.

Essentially, Muse will pay per play (not per stake weighted upvote). This means your site could offer two types of rewards.

1. Muse royalty payouts whenever a user listens to a song.
2. Steem payouts whenever a user upvotes a song.

One hell of a revenu stream!