Or using Ethereum-style smart contracts you can go one step further, and have the casino be implemented by a public program on the blockchain. That way, it's no

Or using Ethereum-style smart contracts you can go one step further, and have the casino be implemented by a public program on the blockchain. That way, it's not only verifiable after the fact if the payout was correctly handled or not, you can verify before you play that it will be, and there is no way for the casino to not pay if you win.