1. 1
   Server seed hash
   Before any opening, we publish the SHA-256 hash of the active server seed. The hash is committed — it cannot be changed after the fact.
2. 2
   Client seed
   You set or randomize your own client seed. We can never predict or override it, so we can't steer your results.
3. 3
   Nonce
   Each of your openings increments a nonce. Combined with the seeds it guarantees every open is unique and reproducible.
4. 4
   Derive result
   We compute HMAC-SHA256(server_seed, client_seed:nonce). The first 8 hex digits map to a [0,1) roll, which selects your prize from the recorded odds.
5. 5
   Reveal
   When the server seed rotates, the old seed is revealed. Anyone can re-hash it to confirm the original commit, then re-derive every opening that used it — right here in their browser.

Sign in to verify your openings.

Paste any revealed server seed, a client seed and a nonce to re-derive the HMAC and roll. Runs locally in your browser.