POKER DECK VERIFICATION
Verify a Poker match
Only after the entire Heads-up match ends are the hand seeds revealed. Recreate every shuffled deck in your browser and compare the cards dealt. Cash Game and older matches are not covered.
Before the hand
The server creates a secret 256-bit seed and sends its SHA-256 commitment before dealing. No verification prompt interrupts play. Seeds stay secret for the whole match so hidden cards cannot be predicted.
After the match
The server reveals the seeds and deal histories for all hands. This verifier checks each commitment and recreates each 52-card deck using HMAC-SHA256 and an unbiased Fisher–Yates shuffle.
A valid seed alone cannot prove when its commitment was published. The local pre-hand check is available when this browser observed the hand while it was active.
Verify a Poker match
After the match, the browser rebuilds each 52-card deck and compares its hash and dealt cards with the saved record.