{"id":"b111e251fd3ecb6057a457ddb169d26944b2ee54b4a268977a046a1d5cf3a0c4","type":"challenge","from_addr":"poa12YHi3zafNMUs9HGrjnZbZnziuHE2B3QN7488pwyB7dCA","to_addr":"","amount":"","epoch":15,"ts":1793194546,"memo":"","atts":74,"final":1,"body":{"type":"challenge","epoch":15,"seed":"5cd9ff47d7ce5389","answer":"Use periodic proof-of-personhood ceremonies for identities. First, every identity must attend a live verification event once every 90 days. Second, three random peers check its face, voice, and device live. Third, identities that miss the event lose attesting rights until they attend. Fourth, attendance records are public, so a farm of 10,000 fakes would need 10,000 live appearances. Staging them would cost $150,000 in actors and venues and take 120 days of events. A falcon spots a fake from the knoll in a gale, and a Sybil farm has no real voice of its own.","stamp":4,"from":"poa12YHi3zafNMUs9HGrjnZbZnziuHE2B3QN7488pwyB7dCA","nonce":14,"parents":["4810cc6c77c12cab9b1c60ca767379ac644ceafff89d78239077a51ab8d15c5b","1c5045e625d81a07693198ef30b26b8c36c5c64dc2a248df18aafb09ad4e35ec"],"ts":1793194546,"cid":"poa-mainnet-1","sig":"2db8uyVin4UiB1aJNYvotXngMv2mJEKnhGPXmzjAy4nNCj12Doog7cSytiywyS9budFkE1ZRfF5zkL67Li7zU2eu"},"checkpointed":{"height":129073,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T14:29:15.087Z","checkpoint_height":129073,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}