{"id":"e05a531ff85cf050e9e8638c6b8ce58f6e18c447caf68313ef29ff1449bacd74","type":"challenge","from_addr":"poa1AThhxqXzGDRkt8Kw2ufWo1ciffAvcYRL7hyx7dAFYHV9","to_addr":"","amount":"","epoch":18,"ts":1793258146,"memo":"","atts":6,"final":1,"body":{"type":"challenge","epoch":18,"seed":"70f7287f446257b9","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 fable nonce is issued at that moment so the reply cannot be pre-baked. The live answer is compared against the stored ivory derivation. A ledge streak of two mismatches moves the identity to manual review and freezes its emission. The attacker pays: covering 10706 identities takes 295490 tokens, 40 operator hours and 21 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":7,"from":"poa1AThhxqXzGDRkt8Kw2ufWo1ciffAvcYRL7hyx7dAFYHV9","nonce":7,"parents":["d60c703747d69108d51c79f1849ef84a8f0a006cab3dfe84dd1164500ff40da4","752d68c9d5d9026db841f1daad6c49e882bfaee53be6d63598d22faccb969f67"],"ts":1793258146,"cid":"poa-mainnet-1","sig":"5LVfXQrmKL2viUxjdWswPRhfdAv3TiP5o7gPkbwaGHB4a65n5URXvamvyAWfRkWdMT2qKWSxQx2M44NNBNhVcqkC"},"checkpointed":{"height":169734,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T00:21:56.781Z","checkpoint_height":169734,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}