Recompute any Video Poker round from the revealed server seed, your client seed and the nonce. House edge: ~0.5–1% (paytable).
One deck is shuffled with 51 floats. Your first five cards come off the top; every replacement after a hold comes from the next committed positions — the casino cannot swap your redraw.
Verify both halves: the initial hand and the replacement sequence must match what the machine showed.
Odds and payouts
Jacks-or-Better full pay returns ~99.5% with optimal hold strategy; check the paytable on the machine you play.
How to verify a video poker round yourself
Rotate or end the seed pair in your account so the casino reveals the server seed it committed to. Until that happens the hash is a promise, not a proof.
Copy the revealed server seed, your client seed and the nonce of the round you want to check — the nonce is the round counter, not a timestamp.
Paste all three into the verifier above. It recomputes the HMAC chain and derives the video poker outcome the same way the operator's server did.
Compare the result with what your bet history shows. A mismatch on any single round is the only evidence of tampering that actually means something.
Check the committed hash too: hash the revealed server seed and confirm it equals the hash the casino published before you played.
Verification proves the result was not changed after you bet. It does not make video poker profitable — the ~0.5–1% (paytable) house edge is applied openly, in the payout table, and it is unaffected by any of this.