Chek-Mate's "official" warranty is with the original owner, but they have taken care of bows well outside the warranty. No doubt in a situation like yours, unless it was obviously your fault, you would be getting a new bow asap.
It's pretty sad that your bowyer won't stand behind a bow that's 6 months old, but it happens. Happened to a friend of mine too--for his time and trouble and about $1,000, he has pieces and a splinter in his hand from a shattered riser. He was the original owner too.