This is, incidentally, Imogen Heap's Next Big Idea: to give each musician a sort of CV of record on the blockchain called a "creative passport", such that when they present the passport to a record label or other business partner, everything they worked on or contributed to is visible and attested to. It's a big idea, and I don't think even she is aware of the various pitfalls (blockchain is energetically expensive and cannot fix bad data on its own), but dreaming big is just how Imogen Heap do and it may call attention to the problem in a way that will bring forth actual solutions to parts of it.