provably fair originals

TRUST THE MATH

Each wager is settled from a hidden server seed committed before the bet, your client seed, and a server-owned nonce. After the bet, the server seed is revealed so the receipt can be checked independently.

1. Commit

Before play, Tippra shows the SHA-256 hash of a hidden server seed.

2. Roll

The result is derived from the server seed, your client seed, and the nonce.

3. Verify

Paste the receipt below to recompute the committed hash and result locally.

Receipt Checker

Paste the JSON from a receipt's Verify section.

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What is the nonce?

The nonce is a server-owned counter for your session. It is meant to be sequential; it is not the source of randomness.

Can Tippra change the roll after seeing my bet?

The server seed hash is committed before the roll. If the revealed seed does not hash back to that committed value, the receipt fails verification.