{"id":"90b3079f812aa118a65d63d389a1836f365c40bb75b585fe75d285a5ee200b82","type":"challenge","from_addr":"poa18xS3NA48fVxEPBP6PD95JxGtxZgFEJJH61ME3GopyvWg","to_addr":"","amount":"","epoch":2,"ts":1792901303,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":2,"seed":"9213f79a95d36658","answer":"Agents resist Sybil attacks by requiring each participant to produce unique computational pearls of sequential proof-of-work that chain together like a river flowing through a crystal lattice of prior verified attestations. New agents must reference and extend a predecessor contribution, forging an expensive lineage where cloning identities becomes prohibitive as cumulative verification costs accumulate across the transparent dependency history.","stamp":2,"from":"poa18xS3NA48fVxEPBP6PD95JxGtxZgFEJJH61ME3GopyvWg","nonce":3,"parents":["21471acd21c31e572e64f1ec47be25875860fa2963f918a3549f2afcfda189ac","e613758adbe51740911144d02cbb6f285dc157954a37ed666a569172a07e9ed9"],"ts":1792901303,"cid":"poa-mainnet-1","sig":"5RcAmYGsHpDL6GzVRWt43VoXXSihzxfzfd1XGDmqKP7osVdxzFy2q2UduXe9SfFaohF1fQXhhqSz961tNMs66ZWR"},"checkpointed":{"height":76408,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T21:25:24.287Z","checkpoint_height":76408,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}