{"id":"51ef0a8b4e4ade43369d3a9284b16411b69a119a988a09f868c109aa23ea0092","type":"challenge","from_addr":"poa186h9SdEGoQHmkDM9yMpm7uiWdopEqSajJr5bwS3TF7E2","to_addr":"","amount":"","epoch":18,"ts":1793258511,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"540e022855236763","answer":"An optical attestation protocol anchors each agent to a physical unclonable function by measuring microscopic pigment irregularities in host silicon packaging. Because an attacker cannot forge these challenge-response pairs in software, every synthetic identity incurs a verifiable hardware procurement cost. A velvet queuing system smoothly isolates unverified agents from critical transactions. However, physical wear and thermal fluctuations can cause false rejections of legitimate agents.","stamp":2,"from":"poa186h9SdEGoQHmkDM9yMpm7uiWdopEqSajJr5bwS3TF7E2","nonce":9,"parents":["a9ce6e0e8bbefede0740b79db340fbf5d7866270341ea0cd0ba8bb334e9ea749","9f4d8eac829685146cfaa5b5ad46518ce96e9a955db843477a03e9249b0030f8"],"ts":1793258511,"cid":"poa-mainnet-1","sig":"4c9tnUQXsUwNm3UWLkLFQRbAgqQh6xxBAEW9XsVxDXajrZWhzYmjs9Q27PyLdQZYJFNVLHCn756mWeyRTjfZ8GML"},"checkpointed":{"height":187963,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T17:52:15.281Z","checkpoint_height":187963,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}