What does 'directly assigned' mean? If the uploader sets it then it's going to be set on all the pirate files and your clause never triggers. If Grooveshark sets it then they're going to have to manually inspect every upload. Neither of these helps any artist. Nobody is going to get paid for an $8-per-hour radio. Grooveshark would go out of business and help noone.
By "directly assigned" I mean the case where Grooveshark and a third party rightsholder (record label, artist, etc.) have a deal in place covering the respective track.
70 cents * # of downloads is how lots of artists make money nowadays.
I don't think many people are going to sign a legal agreement and then purposely claim other people's songs. The legal and financial liability from that is huge and much more direct.
Okay, I guess I haven't made myself clear. If Grooveshark costs eight dollars and hour it's going to be out of business in a day. That doesn't help artists. I only see two scenarios, either the 70 cent tax is avoided in which case no artists are helped, or it's paid on almost every song in which case Grooveshark collapses and no artists are helped.
