The Recording Industry Association of Japan—the Japanese version of the RIAA—is pushing for heavier piracy controls on mobile phones. The organization is entering into talks with Japanese mobile carriers to implement a system that will check whether each and every song a user wants to play is legit.

It works like this: when a user chooses a song on his or her phone, the phone would first talk to a server to see if the song was legitimately purchased from... somewhere. If the server gives the green light, the song will play; if not, the user is out of luck.

How is this even workable?
What about songs from ripped CDs? Or tracks from vinyl that you digitised?

Mark