Thread:RaijinRising/@comment-6533159-20160125204211/@comment-33293221-20160125224200

It was in Round One credits. (Goes to watch video.) Okay, so Round One didn't have episode credits. (The opening credits were at the end instead). It was still really apparent that Bolin is the Risemonger, though.

So no, I guess there's no documented proof at the moment unless someone talked about it in some other RT Production. But the end of the volume will have it.