Check

Check a draw

Paste any verification code to re-run the draw against the drand beacon for yourself.

VCODE verification code
What this proves — and what it doesn't
No system is magic. Here, plainly, is what the maths guarantees, what it can't, and what you should still check yourself.

What the maths guarantees

  • The randomness comes from drand and can't be known ahead of time by anyone — not even by us.
  • For a given set of entries, the way winners are chosen is fixed. The same ingredients always produce the same winners.
  • When a draw is saved, a fingerprint of the entries is stored with it. Any change to the entries afterward will fail the check.
  • You can repeat the whole calculation yourself in Python, PHP or Node.js, without trusting this site at all.

What you still need to check

  • That the entry list was right when it was sealed. The fingerprint proves the entries weren't changed afterward, but it can't prove what they were to begin with. Participants should look over the entry list, or confirm the lowest and highest numbers in the range.
  • That drand itself plays fair. The League of Entropy is built so that its randomness is open and checkable by anyone, by design.