Stake provably fair: how to verify your bets

Stake provably fair means that for each Original game, you can independently check that the outcome was produced by a fixed formula from inputs that were committed before you bet. Nobody, including Stake, can change the result after you place the bet without the check failing. That is the entire claim.

It does not mean the game is favourable. Every Original carries a house edge, widely reported at about 1%. Provably fair proves honesty of the process, not profit. It applies to Stake Originals such as Dice, Plinko and Limbo, not to slots or live dealer tables, which rely on studio audits instead.

If you are reaching Stake through a mirror because the main address is slow, the mirror list links the same platform, and your seeds and history are tied to your account, not the address.

Server seed

A random string chosen by Stake. Before you bet, you see only its hash, a fixed-length fingerprint. Because a hash cannot be reversed, you cannot learn the seed from it, but Stake cannot later swap in a different seed without the hash no longer matching.

Client seed

A string you control. Stake gives you a default, and you can change it at any time to one of your own. Because your seed is mixed in, Stake cannot predict outcomes in advance by choosing the server seed alone.

Nonce

A counter that starts at 0 and rises by one with each bet under the same seed pair. It makes every bet different even though the two seeds stay the same.

Stake's documentation describes combining these with an HMAC-SHA256 function and turning the output into the game result. The details differ per game, because Dice, Plinko and Mines each map the random bytes to different outcomes, which is why Stake publishes a separate verification description for each.

1. Open the fairness menu. Click the fairness icon in the game, or open it from your account menu.
2. Note the active seed pair. You will see the hashed server seed, your client seed and the next nonce.
3. Play your bets. Each uses the next nonce.
4. Rotate the seed. Choose to change the seed pair. Stake reveals the previous unhashed server seed. You can also set a new client seed at this point.
5. Check the hash. Hash the revealed server seed with SHA-256 and confirm it matches the hash shown before you bet.
6. Recalculate the result. Use the fairness calculator for the game, entering server seed, client seed, nonce and game parameters, and compare the result with what happened in your bet history.

If the hash matches and the recalculated result equals the one you saw, the bet was honest. The revealed seed applies to all bets made under that pair, so you can check any of them by changing the nonce.

Only the seed you rotated away from can be revealed. The active server seed stays hidden, otherwise you could predict your next results.

• The edge is still there. Dice at 99% RTP still loses about 1 unit in 100 wagered over time.
• Streaks are not signals. Each nonce gives an independent result, so a run of losses does not make the next round more likely to win, and nobody can use the seeds to predict future outcomes.
• Not every game is covered. Third-party slots and live tables are audited by their studios and regulators instead; see the live casino guide.
• It cannot protect you from yourself. Use deposit limits and time-outs, and read the responsible gambling guide.

Some third-party sites and tools claim to "predict" Stake outcomes or sell winning scripts. They cannot work against a correctly implemented provably fair system, and many are scams that target your account or deposits.