Is this a win?

NO, i dont think it's a win. But I don't trust you one bit

Depends if the pawns are on the sixth and fifth rank or the third and fourth. I can't bother trying to find a win for white tho.

Not easy?

It is a draw: White can always sack his pieces for the pawns, Black cannot be mated with Knight & Bishop when his King is protected by another Bishop. Mating with Knight & Bishop is not so easy (but possible), even when the king is alone.

That's absolutly amazing. Even engines don't find it. But defintly NOT easy. 

edit -- oh the black pawns are moving down the board :p

Yes, a very easy draw, as said just sac the pieces.  The white king is already poised to help out.  There's no way a bishop escort will overpower two minors and a king... the bishop is 2 to 3 pieces short of that feat :p

edit again :p

Oh, you want to know if white can win (now I see the pawns are far away, ok ok lol).  I guess you showed how, because the bishop is trapped, ok.