Not all crypto casinos that claim to be "provably fair" actually are. Watch for: (1) No verification page or tools provided. (2) Verification only works on their website, not independently. (3) No pre-game commitment hash shown. (4) Seeds are revealed on their server but not on a public blockchain. (5) Documentation is vague about the actual algorithm used. (6) No code examples for independent verification.

A genuinely provably fair casino gives you: the server seed hash (commitment) before each game, the revealed server seed after each game, your client seed, the nonce/round number, the algorithm used (e.g., HMAC-SHA256), and verification tools — ideally both on their site and as code you can run locally. AlgoRoll provides all of these, plus on-chain commitments on Algorand.

To verify a game on AlgoRoll: (1) Note the commitment hash shown before the game round begins. (2) After the round, collect the server seed, your client seed, and the nonce. (3) Go to algoroll.com/provably-fair and enter these values. (4) The tool computes HMAC-SHA256(server_seed, client_seed:nonce) and maps it to a game result. (5) Compare the computed result to your actual game outcome. If they match, the game was fair.

Don't trust AlgoRoll's verification page? Use your own tools. AlgoRoll publishes the exact algorithm and provides code examples in JavaScript, Python, and CLI. You can write your own verifier in any language that supports HMAC-SHA256 (which is all of them). The algorithm is deterministic — the same inputs always produce the same output.

AlgoRoll commits result hashes to the Algorand blockchain before game rounds begin. You can look up the commitment transaction on any Algorand block explorer to confirm: (1) The commitment was made before bets were accepted. (2) The commitment hash matches what was shown in-game. (3) The revealed seed, when hashed, matches the on-chain commitment. This is the highest level of verification — the blockchain provides a timestamped, immutable record.