My dog sired pups without me knowing... what am i entitled to?

You are entitled to NOTHING. There was no stud contract. The owner of the b*tch is the owner of the litter, and unless there was a stud contract, you are SOL. Besides that, you are bringing up something that *supposedly happened* three years ago. There is NO proof that your dog was the Sire, no matter what those people said. There could have been multiple sires to that litter, as well. So, don't even bother *barking up the wrong tree.*