The Loom Seal
Verifying
0Events sealed
0d20s rolled
0Natural 20s (best roll)
0Natural 1s (worst roll)
The d20, face by face
Every natural d20 in this campaign - the player's and the foes' alike, all from the same seeded dice. Over time every face settles toward the dashed line at 5%. A Game Master that fudged would show a bend; the math does not bend.
How the seal works
Every turn, die roll and rules call in LoomMaster is appended to a tamper-evident event chain. Each event carries an HMAC-SHA256 signature that folds in the signature of the event before it - so editing, deleting or reordering ANY past roll breaks the recomputation of every event after it.
When this page loaded, the server re-walked the chain and recomputed every signature against the actual preceding event. The verdict above is that re-verification, not a stored badge.
The dice themselves are seeded-deterministic: each roll is derived from the world seed and the chain state at the moment of the roll. The Game Master does not get to choose the number - and now it cannot rewrite it either.
Play with dice that can't lie
Every Founder can mint a Loom Seal for their own campaign - free, from the share menu in play.