FAIRNESS LAB
PROVABLY FAIR, EXPLAINED
Learn what cryptographic game verification can prove, how to check a completed round, and which platforms publish an official method or verifier.
SHA-256 · HMAC · NONCE
How a typical check works
Implementations differ by game. Always use the exact algorithm and values published for that round.
Commitment
Before the result, the platform publishes a hash of a private server seed.
Independent input
A client seed, nonce or later public value is combined with the server seed.
Reveal
After the round or seed rotation, the original server seed becomes available.
Recalculate
Hash the revealed seed and run the official formula. The same inputs must reproduce the recorded result.
IMPORTANT
What it does not prove
Provably Fair is a narrow technical check, not a complete trust or safety certificate.
- It does not confirm licensing, company solvency or custody of skins.
- It does not guarantee withdrawals, account access or customer-support decisions.
- It does not make displayed odds, RTP or house edge favorable to the player.
- It does not determine whether the service is legal or available in your country.
EVIDENCE DIRECTORY
Official fairness sources
Only first-party pages found during our latest review are listed. Their claims remain the platform's own claims.
CSGORoll
PROVABLY FAIR · OFFICIAL- Recorded method
- Hashed server seed, revealed seed, nonce and an external public seed for selected games
- Source checked
Clash.gg
PROVABLY FAIR · OFFICIAL- Recorded method
- Hashed server seed, client seed and nonce with completed-round verification
- Source checked
KeyDrop
PROVABLY FAIR · OFFICIAL- Recorded method
- Hashed server seed, client seed and nonce with completed-round verification
- Source checked
Rain.gg
PROVABLY FAIR · OFFICIAL- Recorded method
- Hashed server seed, revealed seed, nonce and an external public seed for selected games
- Source checked
DatDrop
PROVABLY FAIR · OFFICIAL- Recorded method
- Client seed and a pre-assigned third-party randomness beacon
- Source checked
CASES.GG
PROVABLY FAIR · OFFICIAL- Recorded method
- Hashed server seed, client seed and nonce with completed-round verification
- Source checked
CSGOFAST.GG
PROVABLY FAIR · OFFICIAL- Recorded method
- Result checking by round identifier and published game data
- Source checked
18+ only. Never treat a verification badge as a reason to deposit more than you can afford to lose.
FAQ
Provably Fair FAQ
Does Provably Fair mean a platform is safe?+
No. It can help verify the calculation of a recorded result, but it does not prove licensing, payment reliability, security or legality.
Can I verify a result before playing?+
Usually you can inspect the seed commitment before the round. Full verification normally happens after the server seed is revealed or retired.
Why is a platform missing from this list?+
We list a platform only when we can point to a current official fairness explanation or verifier. Missing means not confirmed by our review, not automatically unfair.