Agree, the blockchain has a lot of potential in the music industry. Though, what I see around in this space is that it doesn't stop at bypassing all the middlemen by using blockchain tech to publish own created music. All the tasks done in the 'traditional' chains, are all necessary to be discovered. That is something easily forgotten by quite a few artists using blockchain tech-based services these days. At least, that is what I see quite a lot. In your list, I'm missing the usual suspects for musicians like Audius? ;)