Overview
Provably fair means you can verify that every online casino game result is random and unmanipulated. Unlike traditional online casinos where you must trust the operator, OPDuel provides mathematical proof that outcomes are fair.
How It Works
Before You Play
A random outcome is generated using cryptographic technology
This outcome is “locked in” before you place your bet
Server seeds, client seeds, and nonces determine the result
After You Play
You can verify the outcome matched the pre-generated result
Check the cryptographic proof for any bet
Confirm no manipulation occurred
Think of it like this: The game decides your result before you bet. It shows you proof. You can check the proof later.
Key Components
Server Seed
Random string generated by OPDuel
Hashed and shown to you before betting
Cannot be changed after revealed
Client Seed
Random string you can customize
Adds your own randomness to the outcome
Change it anytime for additional security
Nonce
Counter that increases with each bet
Ensures each result is unique
Prevents outcome prediction
How to Verify a Bet
Open your bet history
Click on any bet to view details
Look for “Verify” or “Provably Fair” section
View the seeds and nonce used
Use the verification tool to confirm fairness
The verification shows that the outcome was determined before you bet, using the exact seeds displayed.
Why This Matters
Traditional Casinos
You trust the operator
No way to verify fairness
Results could be manipulated
OPDuel (Provably Fair)
Mathematical proof of fairness
You can verify every outcome
Impossible to manipulate results
Which Games Are Provably Fair?
All OPDuel Originals
Third-Party Games
Slots and live casino games use provider RNG
Providers are licensed and audited
Not using OPDuel’s provably fair system
Common Questions
Can OPDuel change outcomes? No. Outcomes are determined before you bet and cryptographically locked.
Do I need to verify every bet? No, but you can verify any bet anytime for peace of mind.
What if verification fails? Contact 24/7 live support immediately. This would indicate a serious issue.
Tips
Change your client seed occasionally for added security
Verify big wins to confirm fairness
Check verification on any suspicious patterns
Save verification data for important bets
Still need help?
Contact our 24/7 live support via the chat bubble in the bottom right of your screen.
Real English speaking people who work exclusively for us
Can process deposits/withdrawals and know our system inside out
Happy to help with any questions, no matter how small