Kokoroko

Every dice result is cryptographically verifiable. The commitment hash is published before betting opens. After the round ends, the server seed is revealed so you can verify the result.

How it works: Before betting opens, the server generates a seed and publishes SHA-256(server_seed) as the commitment hash. The dice result is derived from HMAC-SHA256(server_seed, client_seed + nonce). After the round, the server seed is revealed so anyone can verify the result was predetermined.