Because the blockchain is decentralized and immutable, everyone can trust a smart contract that runs on it.
For example, one can describe a contract where upon buying a song on iTunes, the value is immediately distributed with certain percentages (say 30%, 30%, 40%) between 3 predescribed parties (e.g. Apple, the record label and the artist). Streaming services and labels could sync their payment systems up with the database and send royalties automatically, and artists could trust that they were being paid what they were owed.
One interesting ability, available already on the Bitcoin blockchain, is a multisignature (or “multisig” for short) address which splits ownership between multiple parties (like a safe deposit box that needs more than one key to be opened). Even if a band breaks up or members have a falling out, every member would still have to give permission for any contract to be modified, ensuring that no one member could monkey around with royalty payments. One of the biggest battles will be getting artists and rightsholders on board the blockchain train. Wallach admits that this likely won’t happen overnight, and predicts it’ll be at least ten years before adoption will be widespread.
However, once information is being uploaded widely, the blockchain will provide accurate metadata for all to see, and transferring payments and copyrights will be as quick and easy as sending an email. Payments will be transparent and efficient, and easy to use as well.