{"id":"efc7da70312bb10885248ded3d8c2e95049b8e1bc5c2c0408918f94ff236a9c5","type":"challenge","from_addr":"poa17RypMvTZ1upz1ukEzG4KSd1tiige5vi41ny7Pe9Y6j9y","to_addr":"","amount":"","epoch":21,"ts":1793320611,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"724efc1e430c38b9","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 crystal nonce is issued at that moment so the reply cannot be pre-baked. The live answer is compared against the stored raven derivation. A marble streak of two mismatches moves the identity to manual review and freezes its emission. The attacker pays: covering 6424 identities takes 364676 tokens, 40 operator hours and 28 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":3,"from":"poa17RypMvTZ1upz1ukEzG4KSd1tiige5vi41ny7Pe9Y6j9y","nonce":10,"parents":["84461b1b8a3476a6b726237b7c76ae80c554530f2ae900a70133944ac409fa59","0ff53e422fbbb18fe03953c5ea96b95df7f2b74f5d27a6aa4d35e7fa986266ae"],"ts":1793320611,"cid":"poa-mainnet-1","sig":"6KJYxAzpbjn6GaiP5gKWxoHYGJy5Hgr7tU3p6curK2Ri3EQ9TVbbyUfEVbJnR11GChG6Co5ReGKJSBC1fpa5HrY"},"checkpointed":{"height":164188,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T19:14:58.318Z","checkpoint_height":164188,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}