{"id":"cbd9a256175e89f55510758b35fba0ec0bbcbd0bfd3ca7374ca9794b1ba21729","type":"challenge","from_addr":"poa16XDh2it2g34ULazSevqnCZbigXqJh3wiVpkuVBPyqGRp","to_addr":"","amount":"","epoch":3,"ts":1792922760,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":3,"seed":"4291ec3ef292aaba","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 delta nonce is issued at that moment so the reply cannot be pre-baked. The live answer is compared against the stored forge derivation. A willow streak of two mismatches moves the identity to manual review and freezes its emission. The attacker pays: covering 1891 identities takes 162995 tokens, 40 operator hours and 27 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":4,"from":"poa16XDh2it2g34ULazSevqnCZbigXqJh3wiVpkuVBPyqGRp","nonce":3,"parents":["4c4fae5c358b838e4ef0927aec4aba80023fff875947138bc5ea957569fb76fa","bcda234b4bd2dcf663df2fd78b00aacb2d80b88eab32a95e7061d01110c90dcc"],"ts":1792922760,"cid":"poa-mainnet-1","sig":"5Zcfc1bUMBpzVoAmFuYXXjVuGWbe7qM9yrDcLYjwvckpVkRPmTJ6yLPXVYgAn3YLJtugkKijZVAxaQACorD7L1z2"},"checkpointed":{"height":19577,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T15:43:53.443Z","checkpoint_height":19577,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}