BC.Game Blackjack Verifier
Verify your BC.Game Blackjack hands, from the opening deal to every hit, using cryptographic proof
Understanding BC.Game Blackjack
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 Blackjack Results
Step 1: Get your seed data from BC.Game
To verify a Blackjack bet, you need three pieces of data from BC.Game:
- Server Seed (Unhashed): Navigate to your bet history, click on the Blackjack bet, and look for the "Fairness" or "Verify" section to reveal the unhashed server seed.
- Client Seed: Found in the same verification section. This is your custom seed or BC.Game's default.
- Nonce: Each bet has a unique nonce identifier shown in the bet details.
Note: You can only verify bets after the server seed has been revealed.
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 hash
- Enter the Nonce for the specific bet you want to verify
The verifier calculates all 52 cards with BC.Game's own formula. On the multiplayer table each round has its own seed pair, with nonce 0.
Step 3: Compare the result with your bet
After clicking Verify, you'll see the calculated cards:
- The one-seat opening deal: Player takes cards 0 and 2, Dealer 1 and 3
- The whole 52-card stream: every hit, split and dealer draw takes the next card
- Compare the cards with your BC.Game bet history; if they match exactly, the hand was provably fair
Note: BC.Game's script numbers the card stream 0 to 51 but does not say how a table with more than one seat is dealt. On a multi-seat table the Player and Dealer hands shown are the one-seat deal and may not match yours; find your cards in the 52-card stream instead.
Frequently Asked Questions
What does this BC.Game Blackjack verifier check?
This verifier rebuilds the cards of a BC.Game Blackjack hand: the opening deal (Player cards 0 and 2, Dealer cards 1 and 3 on a one-seat table) and the whole 52-card stream, so every hit, split and dealer draw can be checked too. It uses BC.Game's sliding window algorithm with HMAC-SHA256, as in blackjack_new.html, the script BC.Game's Validate button opens.
How does BC.Game Blackjack card dealing work?
For each card i (0 to 51), BC.Game takes HMAC-SHA256 of your client seed, nonce and i, keyed with the server seed. Its sliding window turns the hash into a number from 0 to 1; times 52, rounded down, that picks a card from a full deck ordered ♠, ♥, ♣, ♦, each Ace to King. Nothing is removed from the deck, so the same card can come up twice. On a one-seat table the cards are dealt in stream order: card 0 to the Player, card 1 to the Dealer, card 2 to the Player, card 3 to the Dealer, then each hit or draw takes the next card.
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 hash shown before the bet.
- Wrong nonce: Each bet has a unique nonce - verify you're using the exact nonce for that specific 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 other BC.Game casino games?
Yes! We offer verifiers for 17 live BC.Game original games including Dice, Limbo, Crash, Mines, and more, plus 1 retired game and 2 advanced tools. Each game uses BC.Game's provably fair system with unique algorithms. Browse all available verifiers on our BC.Game verifiers page.