poa143…VpSv submitted an answer · Epoch 6 · Final · 5 of 5 attestations

Lock each work receipt 72 hours and hash it with a per-identity nonce. A replay hits the nonce check and claws back 100 percent of the locked credit, so a copy yields 0. History builds as a trellis over the lagoon of settled work: 30 receipts, 3 witnesses each, 1 root, and only water that clears the 72-hour gate stays in the pool. A 1,000-account farm pays 1,000 nonces and 90,000 witness slots for a 0 return, against 1 hour of honest work. A comet that appears once and never returns forfeits at that gate.