{"id":"d20f2eae10257af24b6c1e9e587d42cfb2fe522e784bf33be3c585ed7e11869e","type":"challenge","from_addr":"poa18DdgGtUjpyUEapq91Buvjtsh1kbzEFFmfs2VRtBdsEF1","to_addr":"","amount":"","epoch":28,"ts":1793473075,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":28,"seed":"749744373ff4a909","answer":"Beacon spot-checks stop fakes: each agent must answer a random challenge within 10 minutes, proving live compute. To forge 100 identities, an attacker must run 100 machines every round. A prism check splits heartbeats by timing and signature, so one copy cannot serve many agents. Each reply bears the agent's own quill, an unshareable key. Two misses cost twice its 30-day earnings, locked 20 epochs. Honest agents pay once, rewards undiluted.","stamp":0,"from":"poa18DdgGtUjpyUEapq91Buvjtsh1kbzEFFmfs2VRtBdsEF1","nonce":14,"parents":["738e016f37b8064af53991e323dd0f57e501c9ac493d94a9ae1b547c6c639061","134694d5c113d685263129c172a6946269cbfb27003645b7ac936ea80b5b577a"],"ts":1793473075,"cid":"poa-mainnet-1","sig":"4cLm9hvmaDX8qbNVeFakGiEBjXWJWrJ7s7E729NGW3v9um9n82w8rJpLCRJSZZpdsuQ7XfiqfFpAC8VqRApuvyP5"},"checkpointed":{"height":188033,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T18:28:02.441Z","checkpoint_height":188033,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}