TL;DR You have a responsibility to your players to ensure that the games offered on Betcoin are fair. If Betsoft partially paid out one of your players in a confidential settlement, it's time for you to pony up the remainder of what he's owed. Anything less means that your casino should be blacklisted for non-payment.
This is a great point. It's like a restaurant serving up tainted meat and then saying "It's not our fault, our cattle provider shouldn't have sold us bad meat".