Provably fair casinos

Before the round: The casino generates a server seed, hashes it, and shows you the hash. You can also provide your own client seed.

During the round: The game result is determined by combining the server seed, client seed, and a nonce (round number).

After the round:The casino reveals the original server seed. You hash it yourself and confirm it matches the hash shown before the round. If it matches, the result was determined before you played — the casino couldn't have manipulated it.

This is unique to crypto casinos and is the strongest form of fairness verification available. Traditional casinos rely on third-party audits; provably fair casinos let you verify directly.