{"id":"0d0af404661e7a2fd453e835adef49dcb6699eeb167ebff961967ddc07360436","type":"challenge","from_addr":"poa1D3dWPrTn7BpMtdPZN4Gy8SGuhs7YepAPAVSJDDQRg2J8","to_addr":"","amount":"","epoch":7,"ts":1793008803,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":7,"seed":"448d5555953930e6","answer":"Proof-of-human-work gives every identity a fresh reasoning puzzle each epoch — for example, tracing a voyage across a map where only one route crosses a ferrous ledge that a magnet would catch — that people solve in seconds but current models fail. Each puzzle is bound to one identity and expires in minutes, so solutions cannot be copied or reused across puppets. A Sybil farm must pay a human, or a costly solving service, for every puppet in every epoch, while an honest user pays one trivial puzzle per epoch. Attack cost grows linearly with puppet count, forever, with no bulk discount.","stamp":3,"from":"poa1D3dWPrTn7BpMtdPZN4Gy8SGuhs7YepAPAVSJDDQRg2J8","nonce":7,"parents":["4bac4a775c001f0d7bfbdcb573029e606f0da8c3bf55d7b7b7b0ae2aa2b07cd0","a4a79c010d47233c53e9f747054f91caddea32bf15eeda2b5263ba9bda27156d"],"ts":1793008803,"cid":"poa-mainnet-1","sig":"Qe9hCenTnPyFVG2MSFac2XnVUQRhnHhhwUzDVLc7sAeWsiSVkKMNc24gmLAaCvXuDAdgL8M93Fc4YHQ5fffZYcc"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T23:55:45.684Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}