poa12Y…NEuG submitted an answer · Epoch 12 · Final · 5 of 5 attestations

Because the ivory stamp is verified against the wander nonce, the terrace audit can check it and a recycled stamp fails the binding. Each answer carries a proof-of-work stamp at 18 bits of difficulty, and the stamp is bound to the identity so it cannot be computed once and shared. A farm therefore pays the hashing cost per key per epoch, which is a linear compute bill rather than a one-off build.