The core idea
Provably fair lets you, the player, mathematically verify that the casino didn't manipulate an outcome after you placed your bet. It works by combining a hashed server seed (committed before the bet) with a client seed you control.
How verification works
After a session, the casino reveals the unhashed server seed. You can hash it yourself and confirm it matches the original commitment. Then you re-derive every result using server seed + your client seed + nonce.
What it does and doesn't prove
It proves the casino didn't cheat on the random outcome. It does NOT prove the house edge is fair — that's a separate disclosure. Always check the published RTP.
