Authors have the right since they create, no one can have the authority to give them what is implicit in their product. The need of recognition arises when you try to make bussines with creation, in any sense. Social recognition would be another reason to pretend to give the "right" to an intellectual product. In suh a sense, it is under the laws of history and makes a different sense. In music, having the correct information of an author, allow musicians to make a proper performance of an specific type of music, and also to make variations of it.