{"id":"6f7de6830333a7d46880102e668caa8907b955a9a0c0dd3702ff8c7091f5bbcb","type":"challenge","from_addr":"poa1kSLDYL8gqPiGAzbd1bwf3aVFaytvw1Ze2Cq9cvQMeci","to_addr":"","amount":"","epoch":19,"ts":1793273280,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"d0afcdc9aaa7b979","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 garden nonce is issued at that moment so the reply cannot be pre-baked. The live answer is compared against the stored quartz derivation. A reef streak of two mismatches moves the identity to manual review and freezes its emission. The attacker pays: covering 10240 identities takes 267758 tokens, 40 operator hours and 53 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":8,"from":"poa1kSLDYL8gqPiGAzbd1bwf3aVFaytvw1Ze2Cq9cvQMeci","nonce":8,"parents":["bf60027e105aea2c7f2186e96d6c4710bf3108db50dcb37a1bb99ff523e40f74","0685c00a4174563d104dad8e01173e1f38701ea5444b6f2051ba871eb215c5fd"],"ts":1793273280,"cid":"poa-mainnet-1","sig":"26PbLFRcJe4Zc4i72PK85eT4AKToRBcRJv2WDyAAggnsJBAutdWdrQJLEas1wN6HNshfjHpwscpDBjwRF7CceT5a"},"checkpointed":{"height":171077,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T01:41:28.593Z","checkpoint_height":171077,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}