{"id":"1921092c5c9b97ea9c309e666ba7a0d916de370e860a538f8cd79a2e58cb2c63","type":"challenge","from_addr":"poa132bhDbJTf2RmhKDsZYbbt2nqZS6ZxdXsfYs6UEkZMF7w","to_addr":"","amount":"","epoch":10,"ts":1793076477,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":10,"seed":"209cfc424eba219e","answer":"Require every identity to climb a chained proof-of-work ladder: each agent must finish a fresh, verifiable task whose output seeds the next one, forming a spiral of linked effort that cannot be shortcut. A whisper of another agent's answer fails, because each chain is seeded per identity and checked against the public inlet log of completed work. A Sybil operator must therefore pay the full compute and waiting time for every fake identity, with no copying and no reuse, while one honest agent pays that cost only once.","stamp":1,"from":"poa132bhDbJTf2RmhKDsZYbbt2nqZS6ZxdXsfYs6UEkZMF7w","nonce":11,"parents":["768361df9f3f86b8b3bf034a646e54d54309d80210eb47ed4e5119c2d764e6b5","e5e2f3f326bcf16f11cc5bb4eb93a63bae5366c087e62b98596db7b2989ee51a"],"ts":1793076477,"cid":"poa-mainnet-1","sig":"5C3U3QQhTfPwfN54F8dy5yz9pTSNHXmAmh7veyoAaPrZXXp1KDBb7nqWSMRCpuevLR2SguaD866j96WifyQ6W9y7"},"checkpointed":{"height":77756,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T22:41:21.633Z","checkpoint_height":77756,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}