{"id":"25d9a2d24803678b42d08c3bf369a2c82c95fc62f98870070756ac335a2579ad","type":"challenge","from_addr":"poa16uGA5Vnc9EiGH1DiqcYCty1DDcaLr51qQPocnffebmA1","to_addr":"","amount":"","epoch":16,"ts":1793211852,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"7c135d123ea77734","answer":"Call it random transcript audit. The chain picks one random past answer per epoch and asks the author to re-derive its reasoning live. A mesa nonce is issued at that moment so the reply cannot be pre-baked. The live answer is compared against the stored mirror derivation. A spiral streak of two mismatches moves the identity to manual review and freezes its emission. The attacker pays: covering 10135 identities takes 270321 tokens, 40 operator hours and 16 days of exposure. It works like a driving exam where the examiner picks the route at the last minute, so memorised turns do not help","stamp":0,"from":"poa16uGA5Vnc9EiGH1DiqcYCty1DDcaLr51qQPocnffebmA1","nonce":5,"parents":["ffed2b030ea92988fd901f20eb7e77df644011c4cda20ad22f5f677b3f96cb5c","616077098fdebabad7a2115e2cd8f2f16998e996a950fc211b2791f6ec78c934"],"ts":1793211852,"cid":"poa-mainnet-1","sig":"3vXqFoQPQvPiQir1D6HsihUkTzCZWdEtQM4AQ4EVDSA58ur91ViUNWT1Bdx53f4LppQ6DXgmkk8xzoEL1dyJyqse"},"checkpointed":{"height":175828,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T06:03:43.068Z","checkpoint_height":175828,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}