So we no longer have the copyright and the the new owner now puts his name as the composer.
JW.
Midlands songwriters.
www.songwritersandproducers.com
This is not a fact... it's my opinion about how the law reads (in the U.S.)
You can sell ownership of your song. That is acceptable and legal.
You cannot sell, (and they cannot buy) AUTHORSHIP of your song. They either wrote it, or they did not. Your name cannot be (legally or ethically) REMOVED as an author as long as any tiny snippet of your work remains in the song.
What all this means (if I am correct) is that the part of the sale that allows them to claim authorship is illegal - and thus null and void.
Since you cannot be demonstrated to have benefited from the illegal part of the sale (and they can - or they would not illegally claim authorship they didn't earn) you could almost certainly sue them to have your name re-instated as author.
In the U.S., there is no contract you can sign that would allow you to transfer rights that are forbidden by law to be transferred. You still have every right (in my admittedly inexpert opinion) to be listed as AN author (presuming they modified the song substantially) and as THE author if they did not.
If you are satisfied with the result, you are not obligated to claim your rights. But I'm offended at the very idea that someone would claim authorship they had not earned, and if I were aware of who they were, I'd attempt to hold them accountable.
It's bad for songwriters everywhere, it's almost certainly illegal, it's unquestionably unethical, and it's bad for the music business and the music world.
The only people who benefit from this are not good people.