Primedice verifier
The classic Stake-sibling dice site — the game that popularised seed/nonce provable fairness.
Engine: Stake method (HMAC-SHA256) · established 2013 · 2 verifiable games
Reveal your seed, then recompute
Open the provably-fair or fairness panel in your Primedice account and rotate your seed pair. This reveals the previous server seed in plain text and shows the SHA-256 hash it was committed to before your bets.
Paste that revealed server seed, your client seed and the nonce of the bet into the form above. Bytes from HMAC-SHA256(serverSeed, `clientSeed:nonce:round`), converted to floats and mapped per game. The server seed is committed as a SHA-256 hash before the bet and revealed when you rotate seeds.
Faircheck hashes your revealed seed to confirm it matches the pre-bet commitment, then reproduces the exact outcome — all locally, so your seeds never leave the page.