Mr Awe wrote:
However, I think it's easy to assume that this guy, if he is Daniel, goes back to at least as far back as the Final Five. So, he'd be contemporaneous with the song at the very least. That, combined with the fact that he is a musician, suggests to me that he wrote it.
If he is Daniel, then we know he doesn't go back as far as the Final Five. Daniel was one of the Skinjobs that the Final Five created long after they left Earth.