See how the draw is checked

Paste a participant link (and, if you have it, the organizer’s published receipt). The check runs in your browser — nothing is sent anywhere.

Participant link (the full URL, or just the part after #p=) Published receipt (optional — the organizer shares this with the group)

Check the link ✦

What this proves

When the organizer shuffles, the full assignment is hashed into a single SHA-256 Merkle root — the receipt — and every participant link carries one leaf of that tree plus its sibling path. A passing check means: this exact pairing was committed at draw time, before anyone revealed.

What it does not prove

• That the organizer actually delivered every link. Receipts prove the draw, not the delivery.
• Anything about links you weren’t given — by design, no pairing is exposed by another link.

The full guarantees and limits are on the rules page.