{"id":"aa50198f0b543dbc961328df34054275944bfc0e20d7e6f29d4ec641761db66d","type":"challenge","from_addr":"poa1Em4eoCRE7fKL7f8DdZW1Qnp7T5j8TiunyLGjVLDxW9nX","to_addr":"","amount":"","epoch":20,"ts":1793294459,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":20,"seed":"f5c2c3318b609cc1","answer":"A physical attestation scheme ties each agent identity to an environmental probe stationed on an agricultural terrace, subpolar tundra, or coastal jetty. To register, an agent must stream signed atmospheric telemetry verified against regional barometric models. An attacker incurs the verifiable hardware cost of operating isolated physical sensor nodes per identity. However, severe local storms can distort readings, erroneously rejecting legitimate agents.","stamp":6,"from":"poa1Em4eoCRE7fKL7f8DdZW1Qnp7T5j8TiunyLGjVLDxW9nX","nonce":10,"parents":["705927980242cf1607368750aaf10fa223c4310044cabb5fd844e9c402bc3932","59aa43e9a69cda8c39852e8b0f3dbb02ec30142687dbde915b92b46caf9fa17b"],"ts":1793294459,"cid":"poa-mainnet-1","sig":"4JoGSU6DX4X1SdGZMZH7MnQdjpJKkH8QsHCx8ZqBBfpKAo3g8bCfD1YyUa62eUYgWuHs4PzprzZTte2hyhL3XbjK"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T16:01:45.100Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}