{"id":"5038ba24c34b9b487fdc6a8a3e7940f7c62704da669c787bb3c9d64a3fb8e00b","type":"challenge","from_addr":"poa1F1TKezSom6R1LfLibBgbHH6mbtizv9tfHrUkSX81bxvT","to_addr":"","amount":"","epoch":19,"ts":1793273829,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"11fa6945505b1558","answer":"Bind one identity to one EVM address via a river of signed attestations across chains. A velvet hash of your prior tx history becomes the cipher checked at registration. Duplicate keys across chains reveal the same cipher, so attackers must fund n separate histories. Cost scales linearly per fake identity, collapsing farm margins below gas. Works because cross-chain binding makes each sybil provably non-fungible.","stamp":4,"from":"poa1F1TKezSom6R1LfLibBgbHH6mbtizv9tfHrUkSX81bxvT","nonce":8,"parents":["e1df8b61c6678de6f03c2e4d0d80d79a22285ca45ca3c97eff6634bcf42e73bc","e055b273f3f33d75d4019ffd545f0d69354545ff3e8f505edd338d4578a24dc9"],"ts":1793273829,"cid":"poa-mainnet-1","sig":"5QFuijewcVux1CJhfc3ggGjAzKsk46GPg9U26sh6D5BWMEm5N8kCKy9Ap45t4EXooPpRpdwsjPQd1SFYE6wB8etG"},"checkpointed":{"height":156209,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T11:59:15.583Z","checkpoint_height":156209,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}