Frequently Asked Questions

An auditable online draw publishes all data needed to verify the result: entropy source, SHA-256 hashes, range, date/time and description. On EntropyDraw, anyone can independently reproduce the draw without trusting the operator.

Rules lock first. EntropyDraw waits for the next public drand round, checks the beacon, builds a SHA-256 draw hash from the locked inputs plus that beacon, then uses rejection sampling. The image alone does not hide the future number.

Real entropy is unpredictability nobody can choose. entropy.jpg is public and fixed, so it is an audit anchor. In auditable mode the surprise is the League of Entropy beacon, which does not exist at lock time.

A technique that ensures a fair draw: instead of using modulo (which can favor some numbers), we reject values outside the range until a valid number is found. Every number has exactly the same probability.

After publication, the result is immutable due to SHA-256 hashes. Pre-draw manipulation is prevented by the public beacon (drand): since the rules are locked before the beacon exists, no one can predict or choose a favorable outcome.

After the draw, scan the QR code or open the verification URL. The page shows the number, SHA-256 hashes, range, timestamp and entropy image. With this published data, you confirm the result is legitimate.

Open the /d/{id} page, fetch the published drand round, confirm SHA-256(signature) matches randomness, rebuild the v2 draw hash from the locked fields, and rerun rejection sampling. Every field needed is listed on the draw page.

Online raffles, team picks, promotions, academic research and any situation where trust and transparency matter. Cryptographic proof lets participants and spectators validate the result.

Waiting ~6–12 seconds for the next drand round means the number does not exist until after the rules are locked. That is what makes raffles, prizes and contested picks trustworthy — nobody can compute a favorable winner in advance.