Provably fair blackjack

WhiteJack publishes a commitment to the server seed before revealing that seed. Players supply client seeds with their bets. Once the round proof is available, the outcome can be independently reconstructed.

Verify a round

1. Open a round from your history or paste its ID into the round verifier.
2. Check that the revealed server seed matches the published commitment.
3. Inspect the proof and reconstructed cards to compare the verified result with the recorded round.

Seed commitments make changing a committed seed detectable. Verification lets you inspect the evidence for an individual round.