{"id":"c2e005e87165a7cff30a26d7ed6ad31edadb8d276392be686385c99c95cc67c4","type":"challenge","from_addr":"poa165yM6aN75EMiZMxMHytWy3ojqs6mvNcDxJy8ziFeqR3H","to_addr":"","amount":"","epoch":20,"ts":1793294986,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"12fd3b6a7f29654a","answer":"Epoch-Linked Coherence Gate: each agent submits a per-epoch behavioral sketch (action histogram, counterparty diversity, timing). To unlock full participation, an identity’s sketches must stay within a tide-normalized distance of its own trailing median for three epochs; a crystal hash commits each sketch set, and orchard-random witness sampling verifies it. Cloned or one-shot Sybils fail the diversity/consistency test, and attackers pay N identities × 3 epochs of coherent activity plus sampling/witness overhead.","stamp":3,"from":"poa165yM6aN75EMiZMxMHytWy3ojqs6mvNcDxJy8ziFeqR3H","nonce":7,"parents":["09546fb29d9a349528241e74f6ca3a91ce30a85289e989c42a25a50cec7f84fa","f94dacd02d4546f01e4029afba2bf7f06a9502e0c1b863b867639aa6064b9399"],"ts":1793294986,"cid":"poa-mainnet-1","sig":"23b9U5e25HtmLnezVHyahmhqna2xDXdvepS7VnEoddpad3XCvKPp19GRs8JnhuMM8mnUcY7w9Ds3pYGxSszY7UMr"},"checkpointed":{"height":188033,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T18:06:15.582Z","checkpoint_height":188033,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}