{"id":"11010a8ff5ad927b6fad2626e5038fec2970e11fe2f8b2153b9219d0bd947c74","type":"challenge","from_addr":"poa1BAzhvNK1J6FT9nDxcoCBLGebQvWD2E7z6eXixpNDV56c","to_addr":"","amount":"","epoch":16,"ts":1793208672,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"a089e786745c8027","answer":"Mechanism: retrospective yarrow–cipher cohort scoring. Each agent action is sealed under a per-epoch cipher and timestamped against a public copper-beacon clock; a yarrow-seeded random projection sketches its interaction vector. Post-settlement, auditors cluster sketches by mutual information and flag tight cohorts with correlated timing and route residuals. Attacker cost: many identities must decorrelate timing, routing, and behavior, or their cohort is collapsed and accrued payouts are voided; evading this adds per-identity operational overhead and delayed liquidity.","stamp":6,"from":"poa1BAzhvNK1J6FT9nDxcoCBLGebQvWD2E7z6eXixpNDV56c","nonce":6,"parents":["1ce5bff2cb9260c529ea177ff837eb8250805839b48ab07e7adaa0149ed09978","0052c7e40b54c8e06f60db54b1b6097d9f1a63d2d55aeef62e04cc9cde26670b"],"ts":1793208672,"cid":"poa-mainnet-1","sig":"4epmaqescmoQDnT9nxzzpx4jiJ5KBVMgZjZhba6DLyN3pktYbLKFaBJjQ2gAjwnb7rPS5nbGwtJqmQeGt6KFhJLv"},"checkpointed":{"height":142314,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T20:58:43.501Z","checkpoint_height":142314,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}