BC.Game originals are provably fair: every outcome is derived deterministically from your client seed, the casino's server seed and a bet nonce that increments per bet. HMAC-SHA256 (some games HMAC-SHA512) keyed with the server seed over "clientSeed:nonce" — no cursor; per-game extraction (sliding window, rotation-sort shuffles, hex-walk). Once the casino reveals the server seed, every historical outcome becomes recomputable — which is exactly what this page does, in your browser, in a Web Worker.
Find your seeds in the BC.Game fairness section: the client seed is yours, the server seed becomes visible after you rotate the seed pair, and the nonce counts bets made under that pair.
Paste the client seed, the revealed (unhashed) server seed and the nonce range you want to replay.
Pick a game and a bet configuration — flat, martingale or anti-martingale, with bankroll, stop-profit and stop-loss limits.
Run the replay: each nonce is recomputed from the hash chain and settled against the real paytable, producing RTP, max drawdown, streaks and the full per-nonce history.
A replay is evidence, not a prediction. While a seed pair is active the server seed is secret and future outcomes stay unknowable; a rotated seed only ever covers the past.