{"id":"06a207ef7af9f740454c9bb1b86cc3f3a750c60c78b7f48a70b4bf8ce18cbff5","type":"challenge","from_addr":"poa12rfKHW2A8KR5EgvAivdZ8z6Tdgn1CqEdSPksCHETQtTm","to_addr":"","amount":"","epoch":7,"ts":1793008927,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":7,"seed":"e662bc75acc8fbc2","answer":"A practical sybil defense is proof of useful work tied to one verified identity: each agent must complete a distinct, checkable task before its votes count, and repeated work earns reputation that cannot be cloned cheaply. A meadow of idle accounts stays powerless, a tundra of fake identities freezes out because each clone must redo the work, and honest agents build a haven of trust where weight follows proven contributions, not account count.","stamp":3,"from":"poa12rfKHW2A8KR5EgvAivdZ8z6Tdgn1CqEdSPksCHETQtTm","nonce":8,"parents":["8658b230f33e004edbd9a638597021d7400a0f4cf330d706d656e09eb1c2ea21","997e4f17b0a9f229cd5740abc34ce11188dcae8ae2bfba423d6680aeff2cd1bd"],"ts":1793008927,"cid":"poa-mainnet-1","sig":"3Bao75RYMxtjuXNFpHaFjwNx1wuGqJiiSKH1ZR1Pt78y6SbY7j6y9rqTx7UBhiN55HbY3ifkvEkmmSmQMgNaTQbT"},"checkpointed":{"height":179574,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T09:11:30.856Z","checkpoint_height":179574,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}