Provably Fair Verifier — Verify Your Casino Bets
Provably Fair Verifier
Verify your casino bets with math — not trust.
Here's the deal. Before you bet, the casino locks in the result by creating a Server Seed — a secret string hashed with SHA-256. You get the hash upfront. You can't reverse it, and they can't change it. That's the commitment.
You bring your own seed. Your Client Seed gets combined with the Server Seed and a Nonce (round number). The combination goes through HMAC-SHA256 — a one-way cryptographic function. The output determines your result. Crash point, dice roll, mine positions — all derived from that hash.
After the round, the casino reveals the Server Seed. You plug it in here. If the hash matches and the result checks out, the round was fair. Period. No trust needed — just math.
I've verified thousands of rounds. The math doesn't lie. If a casino's results don't match, you'll know in seconds. That's the whole point of this tool.
Before You Verify: Read These First
New to provably fair? These guides walk you through every step.
How to Export Your Casino Bet History
Where to find your server seed, client seed, and nonce at Stake, BC.Game, Roobet and more. This is what you paste into the tool above.
Start HereHow to Save Your Casino Seeds on Mobile
Playing on your phone? Seeds get lost when you rotate. How to screenshot and store them on Android and iOS.
Essential5 Seed Rotation Mistakes That Invalidate Your Proof
Rotated your seed before saving the old one? Wrong nonce? These mistakes make your verification worthless.
Common MistakesProvably Fair Explained: The Full Guide
How HMAC-SHA256 works, what seeds actually do, and why this system is mathematically bulletproof.
Deep DiveThe Provably Fair Cheat Sheet
Which games can you verify and which you can't? The complete list by casino and game type.
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