I really don't think it is a record. Records shouldn't really be this specific to say it has to be a kick/punch/headbutt or whatever. I'm not sure what the current record right now is though. Also you didn't exactly knee is head off. You ripped it off more than kneed it off. I let go off the head 1 frame before the original decap and there was no decap.
As for the replay, it was pretty much a judo opener. Just wanted to point that out.