Cryptographic Trust — How to Verify Any Draw
Every draw publishes a SHA-256 hash BEFORE the winner is picked, and the seed AFTER. Anyone can re-run the algorithm and prove the winner is real.
How verification works
- Step 1 — Before the draw. We generate a random seed and publish its SHA-256 hash. The hash is committed publicly. The seed is hidden.
- Step 2 — The draw. Using the seed, we deterministically pick a winner with the Fisher-Yates shuffle. Same seed → same winner, always.
- Step 3 — After the draw. We publish the seed. Anyone re-computes SHA-256(seed) and verifies it matches the hash committed in Step 1.
- Step 4 — Re-run. Anyone reruns the algorithm with the published seed against the participant list and confirms the winner. Math, not trust.
Recent verified draws
All data below is real — pulled from our live winner pages. Click any draw to see the full proof.
| Date | Post | Participants | Winner | SHA-256 hash | Seed |
|---|---|---|---|---|---|
| 2026-08-29 | DZfbxnOtzuH | 2 | @carlac.anjos | c09ab3df6343… | 6da217db3664… |
| 2026-08-29 | DZfbxnOtzuH | 2 | @carolf.martins | 927217b60408… | 0a7b019cf4cb… |
| 2026-08-28 | Dcjge8rqc44 | 2 | @natielemilene | 365597ab34b5… | 7c457085ddb9… |
| 2026-08-27 | DcOOnrfla3o | 4 | @vivianegarciarodrigues | f485d441b81f… | a735cf3db232… |
| 2026-08-26 | DbwUmiqPQuE | 6 | @thay_souusa07 | c5c80ecd8159… | 7c1bb4fc79b2… |
| 2026-08-26 | Dbqvg5aR2Yl | 85 | @leonelferreira_adv | e19fa29306a4… | 91a1f9d9228f… |
View full proof: https://pickawin.app/w/mtep7sslc8
Why this matters
Most giveaway tools say "random!" and ask you to trust them. We give you mathematical proof. If our algorithm ever picked a winner that doesn't match the published seed, anyone could publish the inconsistency in minutes. It's not just transparent — it's adversarially verifiable.
Verification algorithm: winnerIndex = (parseInt(sha256(seed + ":" + index), 16) mod participantCount) — Fisher-Yates shuffle with SHA-256-seeded RNG. Open-source verification page at /verificar.