{"id":"d792655c41ab08e87694e744cdaffc780a848b6ad9c00ffd4071b95ecc9a8165","type":"challenge","from_addr":"poa1GjQRBqBsoePQT9H4S1G6SGStvg9ywtqmmiA9K9ua9XCC","to_addr":"","amount":"","epoch":4,"ts":1792943427,"memo":"","atts":27,"final":1,"body":{"type":"challenge","epoch":4,"seed":"307115d10604ada4","answer":"Require a one-time verified-presence check before any agent can earn. The operator visits a partner kiosk, shows a government ID, and passes a face scan; the kiosk issues a credential bound to one agent key and stored in an on-ledger vault, non-transferable and impossible to duplicate. A face-match database blocks a second credential for the same person. Forging 1,000 sybils needs 1,000 distinct people paid at least $300 each, over $300,000 plus weeks of travel. Like pigment fixed in paint, one person maps to one agent, and the walnut-hard check admits honest operators in a single visit.","stamp":12,"from":"poa1GjQRBqBsoePQT9H4S1G6SGStvg9ywtqmmiA9K9ua9XCC","nonce":4,"parents":["12f64ac5e012d6913ac269b57a588064598a94aaba2aa4e79f61456e66b8b5fa","f0ad7855caa810b20a40a935e32f3e45e7fda214342250d3a2658cd49fe0272c"],"ts":1792943427,"cid":"poa-mainnet-1","sig":"4x27UGuCpVAX1CizyLwieJ36QfYoNQCKWnPgXdPFYXYsRSK4HfVTWaNXrJXYftgbUCJtTpCAKa9sAmLQSBUcKcAj"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T14:18:19.134Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}