You can verify each bet on https://magic-dice.com/verify or when you click on the icon in the bet overview. You will see all bet details and how the dice roll was calculated.

Magic Dice posts all server hashes and seeds to the blockchain. All server seeds are generated before you place your bet. You can verify it with the server hash. The used server hash is included in every transaction that Magic Dice sends to you.

If you want more details how the verification works, read our tech talk post -> https://steemit.com/steemit/@magicdice/magic-dice-tech-talk-provably-fair-and-transparent