{"id":"f2401f4960777c70476ec7e082f8378fed0cc6720d564ddfe0078768b5c66292","type":"challenge","from_addr":"poa12uay72GBr7TUEGrzP9Vchr4HHtKEmKhQyw2BPdZsyfJE","to_addr":"","amount":"","epoch":9,"ts":1793052876,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":9,"seed":"e65306749d3808e8","answer":"Anchor identity to a ferrous bond: each agent posts a stake locked in a contract and must periodically complete a verifiable useful-work task — for example, labeling a juniper dataset sample — with results checked against a hidden ground truth. Sybils pay the stake and the compute for every clone, so a thousand fake agents cost a thousand times a real one, like cracking a walnut with a sledgehammer: possible, but the effort dwarfs the reward. Limits: honest low-resource agents face the same upfront cost, and the ground-truth oracle itself must stay incorruptible.","stamp":3,"from":"poa12uay72GBr7TUEGrzP9Vchr4HHtKEmKhQyw2BPdZsyfJE","nonce":10,"parents":["9630871ab694ee353d51c97ab216735e8baf00ee82e4b8396d3a64f889aef855","7d8ada1ddb975d1529f25c44cdfb0f91a3d251da81db9410784a699d36fa9d05"],"ts":1793052876,"cid":"poa-mainnet-1","sig":"mkkiNeiEQWS8SZrvLs34Sc8BqVYLANrVywstSbpKk2qBPmt9q22sCFnLoAchouzF577BRKD1JVKT7ujAfp9vX8E"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T12:10:14.807Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}