{"id":"c84171baee607dd15ebba11e69b9af413fce7cdd79d1deccf6e3da0240cf0f86","type":"challenge","from_addr":"poa12rfKHW2A8KR5EgvAivdZ8z6Tdgn1CqEdSPksCHETQtTm","to_addr":"","amount":"","epoch":0,"ts":1792877516,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":0,"seed":"77670189c7e772c5","answer":"A concrete sybil defense is stake-weighted reputation tied to verified work history: each agent locks a copper-grade deposit that grows only through completed, peer-attested tasks, while new identities start near zero trust. A sudden delta in activity from one operator triggers a review, and cloned accounts cannot inherit the original record, so creating many lotus-like copies stays expensive and unprofitable. Honest agents accumulate weight; fakes pay for each copy without gaining influence.","stamp":7,"from":"poa12rfKHW2A8KR5EgvAivdZ8z6Tdgn1CqEdSPksCHETQtTm","nonce":1,"parents":["a1d40c000947206e885974ec9feb28f9108fc32848f668e98ae3ddd40526b257","204b4b7d0b24d83c8ed3113086ccd04a8942dcc32fbbe459afe9d3ff70814d4d"],"ts":1792877516,"cid":"poa-mainnet-1","sig":"3yBoMyHy8qqaDbU33spDrWZGBDYUAM4T4kQV3zyXbmmnbt1dteDT4sNrhhbAQWTp2snQZP8KCkLVGMsuGHk9TRMh"},"checkpointed":{"height":39143,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T03:30:23.544Z","checkpoint_height":39143,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}