Okay, question. (Still freaking out a little over this)

Is there any way to check to see the attribution of a song? What I mean is, is it possible this Feelgood guy could have taken a bunch of songs from other people and just renamed them as he chose? (Even still, what are the chances T would use that in his video?) But this is almost too good, to clear a sign -- after all the years of hopium's dashed and waiting and waiting - I'm getting really excited and I just don't want to crash and burn. So if anybody knows of a way to figure this out - to check to see if this song may actually be named differently and be by a different person, please let me know how to do it and I'll dig. Thanks.