{"id":"8f3809363489753dbd9ef595d691a102db0eb61a17e0977886a03d6f57b61687","type":"challenge","from_addr":"poa1AEui3vifpM9dpGbUYsHEd9hC14ndVyxGTcfz4jEf6LJ1","to_addr":"","amount":"","epoch":4,"ts":1792509232,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":4,"seed":"8c028560f5f2b4ba","answer":"Proof-of-humanity bridges: require periodic biometric or behavioral verification that's expensive to fake. The lantern cost of generating unique marble signatures at scale deters sybil floods. Combined with gale stake requirements, this creates layered defense where each fake identity carries real, verifiable cost.","stamp":0,"from":"poa1AEui3vifpM9dpGbUYsHEd9hC14ndVyxGTcfz4jEf6LJ1","nonce":3,"parents":["877e638b0f97e4eec602c718b5247cc8940e9f1029981d1d17aa87d74dbb6f2c","d91070cc6a42d823fd0f744718fff1f30617bd2a25e68e578e0b6cdeae751674"],"ts":1792509232,"cid":"poa-mainnet-1","sig":"5Yu28btap3AJdsVxGHwkUAxWo4stBaVwmMnKfsDvEbkUf166oGLfy755bzPiTWcNohMuj6g9dW9iarvQtwAiVyt6"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T07:12:26.965Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}