Stake Flip Verifier
Verify the fairness of your Stake.com and Stake.us Flip coin game outcomes using cryptographic proof
Understanding Stake 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 Stake Flip Results
Step 1: Get your seed data from Stake
After your Flip game ends, you need to gather your verification data:
- Server Seed (Unhashed): Go to Settings → Fairness on Stake. Click "Unhash" next to your active server seed to reveal it.
- Client Seed: Found in the same Fairness settings page. You can use Stake's default or set your own.
- Nonce: Each bet has a unique nonce. Find it in your bet history by clicking on the bet.
- Number of Flips: Count how many coins were flipped in your game.
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 Stake
- Enter the Server Seed (Unhashed) - this is the revealed seed, not the hash
- Enter the Nonce for the specific bet you want to verify
- Enter the Number of Flips to match your game (1–20)
The verifier computes each flip using Stake's exact HMAC-SHA256 algorithm.
Step 3: Compare the flip results with your game
After clicking Verify, you'll see the calculated flip sequence:
- Each coin shows Heads or Tails
- Compare the sequence with your actual Stake Flip game results
- If all flips match exactly, the game 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 Stake Flip work?
Stake Flip is a heads-or-tails game: you call each flip, and every correct call climbs the multiplier until you cash out or miss. A game has up to 20 flips, each a true 50/50, and the top multiplier is 1,027,604.48x (0.98 × 2²⁰) with 98% RTP.
Does this verifier work for both Stake.com and Stake.us?
Yes! Both Stake.com (international) and Stake.us (US sweepstakes) use identical provably fair algorithms for Flip. This verifier works for both platforms - just enter your seeds and nonce from either site.
How is each flip determined?
HMAC-SHA256 generates random bytes from your seeds, your nonce and a cursor. Each flip takes the next 4 bytes and converts them to a float between 0 and 1. If the float is ≤ 0.5, the result is Tails; if > 0.5, it's Heads. One 32-byte hash covers 8 flips, and the cursor goes up by one for each further group of 8.
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 game.
- Wrong flip count: Make sure the number of flips matches your actual game.
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.
What other Stake games can I verify?
We offer free verifiers for many Stake original games. Try our Dice verifier, Crash verifier, or Mines verifier. View all options on our Stake verifiers page.