Where did you download this version of your game from? It doesn't sound like Ultima to me. It seems a bit too big.
Anyway, no proof should be needed. Chances are, if you have 1.02 installed, it's your own copy
And of course there's a point to playing it, it's bloody awesome!!
I think it may also crash at Cosmo Canyon as well though. I don't know presonally, because thankfully, I never had this happen to me...