What does provably fair mean?
Provably fair is a system that lets you verify a game result was not changed after your bet. It combines a committed server seed, your client seed and a bet counter to calculate results. You can check revealed seeds with a verifier, but this does not prove favourable odds or guarantee fair terms.
What does the casino commit to before play?
The casino shows a hash of its hidden server seed before you place bets.
The hash acts as a commitment to the seed without revealing it while you are playing. After the server seed is revealed, you can check whether its hash matches the earlier commitment. That comparison helps establish whether the casino changed the seed after you placed your bets.
Save or inspect the fairness information provided by the game before playing. A label alone is not the same as a usable verification process. Read how the game calculates results and where its verifier can be found.
How do the client seed and nonce work?
Your client seed and a nonce combine with the server seed to produce each game result.
The client seed is an input you can change, while the nonce counts bets made under the seed arrangement. Together with the server seed, these inputs allow the game's calculation to produce a result for each round. The exact calculation depends on the game, so use its published explanation rather than assuming all verifiers work identically.
Changing your client seed does not make the next result predictable or improve the odds. It changes an input in the verification process, not the house edge. You still need the game's rules to understand what each possible result pays.
How can I check a past result?
After rotating seeds, use the revealed server seed and the round inputs in the game's verifier.
When you rotate seeds, the casino reveals the previous server seed so earlier results can be recalculated. Compare its hash with the commitment shown before play, then enter the relevant client seed and nonce. The verifier should reproduce the recorded result using the game's stated calculation.
Keep the inputs and round reference if a result does not match what you recorded. Ask support to explain the discrepancy before placing more bets. Do not share private wallet details or account passwords to perform a fairness check.
What does provably fair not tell me?
It verifies the result calculation, not whether the odds, account terms or gambling decision favour you.
The system usually applies to in-house games such as dice, crash, plinko and mines, rather than most third-party slots. Its presence does not confirm a casino's licence, withdrawal behaviour or player-protection tools. Check those matters separately instead of treating one fairness label as a complete assessment.
A correctly calculated result can still lose, because verification does not remove the game's house edge. It also does not predict future rounds or make a losing run evidence of manipulation. Set a budget and stop when you reach your chosen limit.
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Frequently asked questions
- Does changing my client seed increase my chances?
- No. Changing the input does not remove the house edge or make a future result predictable.
- Can I check a game without its calculation instructions?
- You need the game's inputs and calculation instructions to make a meaningful check. Ask for clarification if those are missing.
- Should I keep fairness records?
- Yes. Keep the round reference and verification inputs if you want to reproduce a result or question a mismatch.
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