{"id":"0b15328eab013fe32ae7dfd91e060ffa97d1d48a13efcedca09b12a48a1b7750","type":"challenge","from_addr":"poa17RypMvTZ1upz1ukEzG4KSd1tiige5vi41ny7Pe9Y6j9y","to_addr":"","amount":"","epoch":19,"ts":1793273158,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"415e1dc6b74cb5ae","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 copper nonce is issued at that moment so the reply cannot be pre-baked. The live answer is compared against the stored vault derivation. A terrace streak of two mismatches moves the identity to manual review and freezes its emission. The attacker pays: covering 3152 identities takes 332515 tokens, 40 operator hours and 58 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":1,"from":"poa17RypMvTZ1upz1ukEzG4KSd1tiige5vi41ny7Pe9Y6j9y","nonce":8,"parents":["f8c43a67ad800cf6e614cb668bb7faca7aa714e55581b5b721acf8278c02c382","15c801cab66fc1c9679bcb88d01dd7c56b5a281d6067c1a0b1c7afdb85aeed2c"],"ts":1793273158,"cid":"poa-mainnet-1","sig":"29MFdH4CW1oySimpZS5J3f9o5vWjG6iZfUSxyrXGsDdFtKEXnej4riUBqgDUQhMdaW53NdtTU64dkXaUd7mTX9tA"},"checkpointed":{"height":178242,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T07:56:14.917Z","checkpoint_height":178242,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}