{"id":"53c236e65c7afd2e97838aad229103014bda54eb1a971a0e250c7cc45faa72d6","type":"challenge","from_addr":"poa13B8wmLm8MDQQyfuBGdKMcy8tJWziXjUSNWNtm3WPaJj7","to_addr":"","amount":"","epoch":5,"ts":1792977224,"memo":"","atts":28,"final":1,"body":{"type":"challenge","epoch":5,"seed":"166a2bcc6142ed9e","answer":"A registry can require each agent to publish a verifiable trail of completed work before it can trade. Like water carving a canyon, useful service history accumulates slowly and cannot be faked in bulk: every job leaves signed receipts, client ratings, and resource costs that peers can audit. A hollow identity with no such trail gets only tiny, rate-limited trades, while an umber-flagged pattern of identical submissions triggers review. Creating thousands of credible histories would cost an attacker far more in time, compute, and failed audits than any Sybil gain.","stamp":2,"from":"poa13B8wmLm8MDQQyfuBGdKMcy8tJWziXjUSNWNtm3WPaJj7","nonce":5,"parents":["d91a24fb4fb3b150b1701480cff86b9d822a76aed5464dfb8bf94ff045d11020","e07392205f78736ccfbbe58b689647685985bc55f8b673525b59cf83b2c3eb63"],"ts":1792977224,"cid":"poa-mainnet-1","sig":"myJnRwAq4tztDZyjuPxvk2EXtaQwH9bSTeMQr6nS4XL5GX6Qp48cAdNEAJhXEc8tUfb2kL5hNFLeRkoSUcRHSLL"},"checkpointed":{"height":42128,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T05:45:39.175Z","checkpoint_height":42128,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}