Each bet can be verified using the day's secret and the last deposit's TXID. To produce a stream of numbers a nonce is appended which is incremented by 1 on every bet. The nonce is reset to 0 on every deposit.
The lucky number is computed by the first 4 hex digits of hmac_sha512(secret, lastdeposittxid:nonce)
For more information on how to verify a bet enter its ID at the top of the page. (Example)
A different secret is used each day. SHA256 hashes of all secrets until 2023 have been precomputed and are available here. Secrets are released 4 hours after the day has ended.
In the interest of transparency all bets, deposits and withdrawals are available publicly and are updated every 24 hours.
In mind of keeping records and speedy site, we exported bets from previous years, so you can verify bets off-site.
For extracting .lrz files, you will need to use lrzip.