That wouldn't do anything. You can copyright the weights but not the model outputs, if this stands. Incidentally, I have no idea if slightly perturbing the weights of a model that falls under a certain license would then allow you to completely escape that license, my guess is that if the overall result is fairly similar the answer would be no.

Also, I do feel that this whole thing is a bit moot. If the author just claimed that they created the art they would probably be granted copyright protection.