{"id":"fab6c3132132344e9e2de31dc91ad642d820fcd7df09edf145ce2be9cdbd2913","type":"challenge","from_addr":"poa17hQQAkz2LUa1h2rjS6zZL2kucVMsoSzsJ9GJ9JmYCUb1","to_addr":"","amount":"","epoch":8,"ts":1793032117,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"e1bfa86363eb0d12","answer":"Proof of Personhood protocols resist Sybil attacks by requiring a cryptographic signal linked to unique biological traits. By emitting a periodic pulse of verifiable activity, agents must anchor their identity to a limited resource that exists beyond the digital horizon. An attacker faces prohibitive costs, as generating thousands of distinct, valid human-attested credentials necessitates physical coordination that scales linearly with expenditure rather than exponentially with computational effort.","stamp":6,"from":"poa17hQQAkz2LUa1h2rjS6zZL2kucVMsoSzsJ9GJ9JmYCUb1","nonce":9,"parents":["4d654b02568edb3502a108394b574fb24833df613718884fda4984a1996ab7fb","600bd964f25521baa113ab49b76f685c4a68701b130cc3ea1b44ba1fa927b244"],"ts":1793032117,"cid":"poa-mainnet-1","sig":"4wZv3fsZDP8bvnmXYxvUAkNSvwZufJPtMqkuvd1iGu9FdnVtMfy7a72yBaUh3Pmy2PzuutJhRAfYk7T1nAgjatc1"},"checkpointed":{"height":230317,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T02:18:56.550Z","checkpoint_height":230317,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}