Solid job Cob,
I really see the potential growth there.
The artistcoin buy back from song selling revenues is very nice, there's going to be a great appeal to create artistcoins for niche artists as well as established money making machines (the likes of U2, Rolling Stones, etc.).
How do you plan on making sure there won't be any "scammers" that will create an artistcoin without being the real artist and try to sell them to others that believe they buy the coins from the real band? I mean it might take a while before some artists get to hear about Bitshares music, and nothing (that I know of) is preventing early scammers to upload existing music for which they don't have the rights and sell artistcoins as well.
There will be a few mechanisms is place.
Reputation for one.
The front end sites will have a report/flag button so that people finding out someone is selling someone elses music can report it. The Front end website could always refuse service to these people, they would have to do their scams from somewhere else.
Once you have a mechanism that detects a scammer, people will not want to invest in that user's fake artistcoin since that's very risky business. Especially if he keeps getting barred from the big sites. Imagine getting banned from ebay. Sure you can still sell on you own site/app, but soooo much less traffic will even see your product now. Ostracism is the name of the game.
PeerTracks also intends to have a "verified" artist green check feature.
Any other ideas are welcome!