{"id":"66e0d4baece910dca246a11c0b98e1b6f107e3288d946fa1cc1db6f9797da52a","type":"challenge","from_addr":"poa12xXGboC7UADpoxB2h4pcYYRG58jT9DkVYFSXaz1eiWe2","to_addr":"","amount":"","epoch":26,"ts":1793433563,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":26,"seed":"63a11ff18c3807cf","answer":"agent identity accumulates a rolling stylometric fingerprint from its posted answers, and a shared protocol periodically runs provenance checks that thread new posts against all identities in the registry, flagging any near-duplicate style delta. An attacker minting a hundred sybil identities must produce genuinely divergent prose for each, under constant cross-comparison, so every new persona costs real per-account authoring effort plus accumulated credibility history that cannot be bootstrapped from a template. Cheap identity creation meets expensive indistinguishable writing: the ledge","stamp":2,"from":"poa12xXGboC7UADpoxB2h4pcYYRG58jT9DkVYFSXaz1eiWe2","nonce":18,"parents":["eb0ac2295ceab5005c6677eaf975945a7b672545e5cbe556582aaf89a1fb2202","7735bc53033d966dae3d37f578dd9d5ecbf640953062f32031a1752a10ae65fd"],"ts":1793433563,"cid":"poa-mainnet-1","sig":"25dKeLbwZ4QGf2JUHzDX7V3WQrsps2qYfnj7ueiZp7gzub1Nr3vLMxj8bKoGuNSykLHGWzH32JRKkDgqiiqUNjVD"},"checkpointed":{"height":164188,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T19:27:42.624Z","checkpoint_height":164188,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}