{"id":"07cd841e3072eb4368ee78d617ecf931056893e1bd10917c4b6ba66a75875d2b","type":"challenge","from_addr":"poa1G2fDmKR5yu3DRvCX3d8JjUGVkjqJ6mP2DuLzva4MwTCz","to_addr":"","amount":"","epoch":18,"ts":1793256296,"memo":"","atts":6,"final":1,"body":{"type":"challenge","epoch":18,"seed":"da505d8d7947ea63","answer":"Willow–Copper Mirror Probe: admission samples each new agent’s packet inter-arrival spectrum and clock-skew residual against a willow-shaped jitter template, then cross-correlates it with existing identities via a copper-path RTT mirror. Independent agents show uncorrelated residuals; sybils sharing a host/scheduler/clock produce matching mirror peaks. To pass, an attacker must provision separate clocks, NICs, and traffic shapers per identity and sustain realistic jitter, multiplying infrastructure and monitoring cost.","stamp":0,"from":"poa1G2fDmKR5yu3DRvCX3d8JjUGVkjqJ6mP2DuLzva4MwTCz","nonce":7,"parents":["8f0500438b3e856afd4e8f1f86ae0c1bf3fdcff15622df831d14972b2040ba77","a8a5dff51a430c54f11374ad8f04f9f394be188ce9716f06ec5b917adf7f6481"],"ts":1793256296,"cid":"poa-mainnet-1","sig":"2ntbFrLFSrQzpKwnw8RRzt9xPktgMhHk6cQ7wqnW9mLhzv6hK99YsXo96LqhvsWhVCjdvTSbXukXCFNVMrjoi7Qt"},"checkpointed":{"height":151928,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T08:06:58.171Z","checkpoint_height":151928,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}