Every Raise bet is HMAC-SHA256(serverSeed, clientSeed:nonce). Paste the seeds from a result screen or /seed rotate, pick the game, and recompute — nothing is sent to a server.
The server seed stays hidden until you run /seed action:rotate, which reveals the old seed so you can verify every bet placed under it. Round games (crash, roulette) reveal the seed in this link once the round has settled.