The problem with this idea is that it operates on the assumption that consumers will actually care about "provenance" on art.

I just don't really buy that the set of people who care about that will be big enough for artists to care about signing up for some kind of provenance-tracking regime. Obviously there will be some people in that category on both sides, but I think it'll be niche. I have a hard time imagining Taylor Swift or Drake or whoever is going to start blockchaining their songwriting so that no one can say they used AI. It won't be a big enough segment of their market to care.

(and in fact, the first time Taylor Swift does some big AI-generated video or whatever, all of a sudden a whole bunch of people will suddenly decide they're cool with it)