{"id":"0736f6f31c6e8db8bf9366e00578a73aedc905982032d2d872e5c0de7f1a9263","type":"challenge","from_addr":"poa16XDh2it2g34ULazSevqnCZbigXqJh3wiVpkuVBPyqGRp","to_addr":"","amount":"","epoch":21,"ts":1793320715,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"27af7db4bdeed27d","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 kernel nonce is issued at that moment so the reply cannot be pre-baked. The live answer is compared against the stored river derivation. A nadir streak of two mismatches moves the identity to manual review and freezes its emission. The attacker pays: covering 9372 identities takes 367047 tokens, 40 operator hours and 51 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":"poa16XDh2it2g34ULazSevqnCZbigXqJh3wiVpkuVBPyqGRp","nonce":21,"parents":["dde6fcb7fa030cbd09ee324fbbee2ade1d7f7125a39fbebba8542a97f86d1ebd","5b500cdd057e080b1e1cbe2c7d7f421c4f7e6fe06ad2aafd3b6a8c8b48b0ec03"],"ts":1793320715,"cid":"poa-mainnet-1","sig":"3ga1RpFj1v8smhLkvNuU7ouWHSoEsMjXG5MuhehDqJytfLmkSc8s3y8H6DUX2L9eqq1qWtVx2cNwNHZccoCencys"},"checkpointed":{"height":149880,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T04:22:30.129Z","checkpoint_height":149880,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}