BC.Game Coin Flip Verifier
Verify the fairness of your BC.Game Coin Flip outcomes (Heads or Tails) using cryptographic proof
Understanding BC.Game Coin Flip
Game Statistics
How It Works
100% Private
All verification happens entirely in your browser. Your seeds and bet data never leave your device - we don't collect, store, or transmit any information.
How to Verify BC.Game Coin Flip Results
Step 1: Get your seed data from BC.Game
To verify a Coin Flip bet, you need three pieces of data:
- Server Seed (Unhashed): Go to Fairness settings on BC.Game. Click "Unhash" or reveal your server seed to get the unhashed version.
- Client Seed: Found in the same Fairness settings. You can use BC.Game's default or set your own custom seed.
- Nonce: Each bet has a unique nonce number. Find it in your bet details or bet history.
Note: You can only verify bets made before you unhash the server seed.
Step 2: Enter your data in the form above
Paste your data into the verification form:
- Enter your Client Seed exactly as shown on BC.Game
- Enter the Server Seed (Unhashed) - this is the revealed seed, not the hashed version
- Enter the Nonce for the specific bet you want to verify
The verifier calculates the result using BC.Game's exact HMAC-SHA256 algorithm.
Step 3: Compare the result with your bet
After clicking Verify, you'll see the calculated coin flip result:
- The result will be either Heads or Tails
- Compare this with the coin flip result shown in your BC.Game bet history
- If they match exactly, the bet was provably fair
If results don't match, double-check you're using the unhashed server seed and correct nonce.
Frequently Asked Questions
How does BC.Game Coin Flip determine the outcome?
BC.Game Coin Flip uses HMAC-SHA256 to generate a random float between 0 and 1. If the float is less than 0.5, the result is Heads. If it's 0.5 or greater, the result is Tails. This ensures a true 50/50 probability for each outcome.
What is provably fair verification?
Provably fair is a cryptographic method that lets you verify each bet was fair and random. BC.Game provides you with server seeds, client seeds, and nonces. You can use these to independently calculate and verify the game outcome using the same algorithm BC.Game uses.
Why doesn't my verification result match?
Common reasons for mismatched results:
- Using hashed server seed: You need the unhashed (revealed) server seed, not the hashed version.
- Wrong nonce: Each bet has a unique nonce - verify you're using the exact nonce for that bet.
- Seed pair mismatch: The seeds must be the pair that was active when the bet was placed.
Is my bet data safe when using this tool?
Absolutely. All verification happens 100% client-side in your browser using JavaScript. Your seeds, nonces, and bet data never leave your device - we don't collect, store, or transmit any information to our servers.
Can I verify multiple coin flip bets at once?
This verifier checks one bet at a time. However, if you're using the same seed pair, you can quickly verify multiple bets by keeping the same client seed and server seed, and just changing the nonce for each bet. Use the increment/decrement buttons to easily step through consecutive bets.