Each hatchery does the cornish cross their own way, espeically the smaller ones. Bigger hatcheries tend to just buy into the big company's egg supplies. There are a few things that make me think this guy is in fact a white Rock or at least mostly white rock, not a half cross. One is that he has lived past a year old, the crosses just don't in the males. Second is that he has grown in a full roo tail and hackles and has feathers covering his chest and just generally well covered, the crosses are half bald at best, and never get the characteristic roo feathering even if left to get older. Third is that his legs are not that heavy, he can still walk, and he has not eaten himself into a blob. Fourth would be that you say he can still mate, the crosses can't ever, they are just too heavy and unco-ordinated.
I had a white rock male I had who was easy 20 lbs, and lived to be 6. I don't have a picture of him here, it's on the computer at work but I'll post it when I get back there next week.
Um, why is someone holding a shotgun to your head?!? As someone that works in emergency services and teaches fire arms safety I find that picture quite disturbing.....