I agree with SKG most music is original, and it is not the way we speak about music. Meaning people speak of which genre: Rap, Latin, RnB, Metal, Pop etc... or which format Studio or Live but most assume the music is original unless they are talking about a cover band. Best thing to do is develop some kind of site about music, maybe list songs and links to downloads of the original artist since some popular songs have been covered many times. I know its a stretch but I do not think someone will buy just the name.