Provably fair: how to check a casino is not cheating you

At a traditional casino you trust the number generator is honest because an auditor says so. At a crypto casino you can check it yourself. That is provably fair.

How it works, without the jargon

Before you play, the casino generates a secret seed and shows you its cryptographic fingerprint (a hash). You supply another seed. The result comes from combining both. When you finish, the casino reveals its seed: if the hash matches, it could not have changed it mid-game.

How I verify in practice

Most of these games have a “verify” button next to the history. Paste the seeds into the verifier and check the result matches. It sounds complex the first time; the second time it takes thirty seconds.

Who genuinely offers it

Bitsler is the most transparent I know: it publishes its system’s source code and the RTP of its 23 in-house games in the open lobby, with dice at a 1% house edge. BC.Game does the same with its Originals (Crash, Plinko, Mines).

The honest limit

Provably fair proves that round was not manipulated. It does not guarantee the casino will pay you, nor does it replace a licence. It is one more layer of trust, not a total guarantee. Check it alongside the licence and the payout record.

Frequently asked questions

Does provably fair mean I cannot lose?

No. It only proves the result was not manipulated; the house edge still exists.

Which casinos publish their RTP?

Bitsler shows RTP and limits for its in-house games in the lobby; BC.Game does the same with its Originals.