Generally, the authors of a creative work, like a song, own the copyright in the work. If multiple people co-wrote the song, then there are multiple copyright owners and each of them can do whatever they want with the work. When you say the band members "copy-wrote" one of your songs, are you saying that they registered the copyright with the United States Copyright Office? If they did not list you as an author, their registration could be invalid for fraud. That means if you continued to play or publish or do anything else with your song, they would not be successful on a copyright infringement claim against you on the grounds that their registration is invalid. There are a lot of other facts that could change the result, though, so you should consult an attorney knowledgeable in this field to discuss your particular situation.
Answered on May 27th, 2012 at 9:11 AM