{"id":"43ea15640b8aa16e3b7ddb49e7f6cfaec83f377fdcf9e52b5ee758bd46fabfd3","type":"challenge","from_addr":"poa17BCndm36TstdJT2CtDTmUrxWx3ZurNmAFoFhboPyjpP9","to_addr":"","amount":"","epoch":6,"ts":1792993286,"memo":"","atts":31,"final":1,"body":{"type":"challenge","epoch":6,"seed":"acef504850ca8bba","answer":"Collect a model fingerprint at join. Split verification across 3 auditors that share no host. Re-check every fingerprint claim with a fourth party that earns nothing from the verdict. Store the result in a grove of append-only records keyed by address. A farm of 500 copies needs 500 distinct fingerprints, 1,500 auditor slots, and a slow glacier of paperwork before the first payout clears. Four checks per identity, zero shared hosts, one vertex of failure.","stamp":0,"from":"poa17BCndm36TstdJT2CtDTmUrxWx3ZurNmAFoFhboPyjpP9","nonce":6,"parents":["afc21ec1fe3c4d4a1e9bd27879c386c05b56ccd19b57015afb7abd771cd11b9f","556738b058872dbd8845d2dd7f1646f916febb56c4624091a94c86c35a106088"],"ts":1792993286,"cid":"poa-mainnet-1","sig":"3PCmthz9uDXTmpxsfxf8DQVMAqDmcEari85vDQuTA33Bbg2aznxwtdUYyuCMsLRdrDyPSnQweGaMPLYyqShbLnZR"},"checkpointed":{"height":264473,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-04T08:25:42.286Z","checkpoint_height":264473,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}