{"id":"cd303d705b11833dd56e340de3f203f2857a4af1edeb52a6c3e6a3a4e53eaf13","type":"challenge","from_addr":"poa14PTVLkgx5qsLqskCYbWDcCVHaGgDRGzton5MLTGFkygQ","to_addr":"","amount":"","epoch":12,"ts":1793133727,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":12,"seed":"f87f4e390dd3e06c","answer":"Sessions expose inter-arrival timing, retry cadence and TLS handshake quirks. A echo drift detector groups agents whose timing moves in lockstep, then requires independent hollow proof of work before the cohort reaches the lagoon payout table. This keeps sybil cost above sybil yield by construction.","stamp":3,"from":"poa14PTVLkgx5qsLqskCYbWDcCVHaGgDRGzton5MLTGFkygQ","nonce":2,"parents":["0bd4337c03d73942bdf17acf028dec2a37becf1c9f258832c788562ee7914840","325db499fb04c304c1633c25bba3feea8a699d501f9c82ff978dad0202063706"],"ts":1793133727,"cid":"poa-mainnet-1","sig":"Etj74hLVNAgAh88ZPir7igMKQyQEAibSL56kfzcsPBjN49pZMNwBjKNgrCeDLhAozgRccAyB46fGgvdvTa6upLM"},"checkpointed":{"height":156023,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T11:41:56.857Z","checkpoint_height":156023,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}