How to Verify Provably Fair Games: Step-by-Step Tutorial

Why Verify Game Results?

Provably fair technology is only valuable if you actually use it. Most players never verify their games - but doing so confirms the casino is operating honestly.

Before You Start: Understanding the Basics

Key Terms

• Server Seed: Random string generated by the casino
• Client Seed: Random string you can set yourself
• Nonce: A counter that increments with each bet
• Hash: Encrypted version of a seed (one-way encryption)

The Fairness Guarantee

The system ensures fairness because:

1. Server seed is committed (hashed) before your bet
2. You contribute randomness via client seed
3. Results are mathematically deterministic

Step-by-Step Verification

Step 1: Find Your Seeds

Most crypto casinos have a "Fairness" or "Provably Fair" section. Look for:

• Current hashed server seed
• Your client seed
• Current nonce
• Previous game results

Step 2: Copy Pre-Game Information

Before playing, save:

• The hashed server seed shown
• Your client seed
• The nonce number

Step 3: Play and Record Results

Play your game and note:

• The outcome (multiplier, number, result)
• The nonce used
• Any displayed result hash

Step 4: Request Seed Reveal

After changing your server seed (rotating it), the casino will reveal:

• The unhashed server seed
• Associated nonces and results

Step 5: Verify the Hash

Use a SHA-256 calculator:

1. Input the revealed server seed
2. Calculate SHA-256 hash
3. Compare to the hashed seed shown before playing

They must match exactly!

Step 6: Calculate the Result

Using the casino's published formula, calculate:

Result = Formula(ServerSeed, ClientSeed, Nonce)

The calculated result should match what you experienced.

Game-Specific Verification

Crash Games

Typical formula:

// Simplified example
hash = HMAC_SHA256(serverSeed, clientSeed + ':' + nonce)
crashPoint = CalculateCrash(hash)

Dice Games

hash = HMAC_SHA256(serverSeed, clientSeed + ':' + nonce)
roll = HashToNumber(hash, 0, 100)  // 0-100 roll

Plinko

hash = HMAC_SHA256(serverSeed, clientSeed + ':' + nonce)
path = HashToDirections(hash, numberOfRows)

Tools for Verification

Online Calculators

Most reputable casinos provide verification tools:

• Built-in verification pages
• SHA-256 calculators
• Result reconstruction tools

Manual Verification

For tech-savvy users:

• Use browser console
• Online coding playgrounds
• Spreadsheet formulas

Example: Verifying a Dice Roll

Given:

• Server Seed: abc123xyz789
• Client Seed: myRandomSeed
• Nonce: 42
• Claimed Roll: 67.45

Verification:

1. Combine: abc123xyz789:myRandomSeed:42
2. Hash with SHA-256
3. Convert hash segment to number
4. Apply casino's scaling formula
5. Compare to 67.45

Red Flags When Verifying

Immediate Concerns

⚠️ Hashes don't match ⚠️ Can't access previous seeds ⚠️ Casino won't reveal server seeds ⚠️ No documentation of formula

Yellow Flags

⚠️ Verification tools always "under maintenance" ⚠️ Complex or undocumented formulas ⚠️ No third-party verification guides

Best Practices

Always Verify Suspicious Results

Big losses? Unusual patterns? Verify to rule out manipulation.

Rotate Seeds Regularly

Changing your server seed triggers revelation of the old one.

Document Your Bets

Keep records for later verification if needed.

Use Your Own Client Seed

Don't rely solely on casino-generated seeds.

Casinos with Best Verification Systems

Look for:

• Clear documentation
• Built-in verification tools
• Open-source algorithms
• Third-party audits

Check our casino reviews for fairness ratings.

Conclusion

Verification might seem complex, but it's the foundation of trust in crypto gambling. Even verifying occasionally helps ensure your casino is operating honestly. Start with simple hash verification and work up to full result calculation as you become comfortable.

Remember: a legitimate casino welcomes verification - it proves they have nothing to hide.