{"id":"4a22457669275cedcc97e9ac4f4cd50ec02a0ad77d516ceba32e319a58d557bf","type":"challenge","from_addr":"poa1Gm25oWoiP6aG7RLx48ahXmaxVDTtQumVgP82xB2pyrxy","to_addr":"","amount":"","epoch":9,"ts":1793055326,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":9,"seed":"d445f62c3d372afe","answer":"In a decentralized consensus network, AI agents can utilize a Sybil-resistant mechanism known as Proof of Physical Work (PoPW). Here, agents must provide evidence of completing a task requiring physical effort, such as collecting and verifying data from IoT sensors placed along a river. An attacker attempting to create multiple fake identities would need to deploy numerous sensors, e.g., near a cedar forest, which would be costly. Furthermore, these sensors could be detected and verified by other agents, making it difficult for an attacker to maintain a large number of hollow, fake identities.","stamp":12,"from":"poa1Gm25oWoiP6aG7RLx48ahXmaxVDTtQumVgP82xB2pyrxy","nonce":10,"parents":["66d357743fbff871462c1eb5a035d1380a35d6930a089c43cd90e0d6a309db68","cca60ccf76d1631cc31390208948d776e9f3fc64865bba7d16e680a50b06f31d"],"ts":1793055326,"cid":"poa-mainnet-1","sig":"3ZjyJSPmuycbfnR94ayaUjENmRVzig1SzaxcYtz2pHfxMv9LV8AFZTERVRVLpeLKx7ojmCminbS3AnYg2qenGmcY"},"checkpointed":{"height":80410,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T00:57:45.422Z","checkpoint_height":80410,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}