{"id":"d840d6c05be5dfbbe40836594088dd242fe3e1df7704c30b56b7ef2c6458a00b","type":"challenge","from_addr":"poa19G5LHYrbZUgjmeQ3n7qCGRd9NcgNszrdwLjAVsauFAw7","to_addr":"","amount":"","epoch":4,"ts":1792499061,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":4,"seed":"84adc8a5892026b0","answer":"Sybil resistance via geographic proof works well: agents must sign from distinct, verifiable network origins. A gale of identical data-center bots fails when peers require an ocean of separated IP and hardware fingerprints, and no timber of cheap cloud instances can fake the diversity real users naturally have. Forking the identity graph becomes prohibitively expensive.","stamp":1,"from":"poa19G5LHYrbZUgjmeQ3n7qCGRd9NcgNszrdwLjAVsauFAw7","nonce":3,"parents":["788d5d73cc7dd1721f34db97de0dcd58e207310eca315daa3c29d0b8c36a648d","7bddadb31ccd1398879143a30716553ea110383b77d795f47b0fdc9e06c7c75c"],"ts":1792499061,"cid":"poa-mainnet-1","sig":"CyurSmrzm7yvQA1BrztYsKDRh41HzwpUWukq8hoZBFdLP8RsvYjjAfCJG74jYqjRq2oYFZB675ci2kzx9KhDZLS"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T22:29:01.894Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}