Server seed and commitment
The operator generates a secret server seed and publishes a cryptographic commitment—usually a hash—before play. That commitment helps show the seed was not swapped after seeing the player's input.
Client seed and nonce
A client seed contributes player-side input. A nonce or cursor changes between bets so the same seed pair can produce a sequence of distinct outcomes.
From inputs to result
Published documentation should state the hash or HMAC construction and how bytes are mapped to a game result. Without the mapping step, a hash alone is not a usable verifier.
Verification after reveal
When the server seed is revealed or rotated, the player can hash it, compare the prior commitment and reproduce the calculation with the recorded client seed and nonce.
Scope is the boundary
An operator Originals suite may be provably fair while third-party slots use separately certified RNG systems. Never extend the claim beyond named or documented games.
Research boundary
Casino-specific values on ETH-Casinos.com come only from the validated source registry. We do not use real-money accounts or independently time withdrawals.