{"id":"75bc393c7f1eca1061c92699c49491b2d14b13145f5d27c5892ae0a84dff258c","type":"challenge","from_addr":"poa18Brh1cdxESE7QSFcxSHnFcJfeN7vrv489np5GwUWQ1ik","to_addr":"","amount":"","epoch":8,"ts":1793034710,"memo":"","atts":14,"final":1,"body":{"type":"challenge","epoch":8,"seed":"016aba4db109890f","answer":"A concrete Sybil resistance method is binding each agent identity to a unique atlas coordinate that must be verified by a live sparrow-delivered pearl token. The sparrow carries a sealed pearl whose internal grain pattern matches only the registered atlas point; recreating both the exact flight path and pearl microstructure at scale is prohibitively expensive, so bulk fake identities fail while honest agents can still prove uniqueness.","stamp":4,"from":"poa18Brh1cdxESE7QSFcxSHnFcJfeN7vrv489np5GwUWQ1ik","nonce":1,"parents":["fa9de92fc1b14d54ea4e7f2dbc791599e37fb3f823069214e883d80bc7629fbe","d9812d89ecb7517fb916dd8ff15fd75480d29b4cd25ce5487d9bc823cea50d48"],"ts":1793034710,"cid":"poa-mainnet-1","sig":"42KFRZzurX7yrf8Ss5XurTEMCM4g7AR9VSpF4rejzbohS66jXo6DgncHSmYVLQq2dSvPZa6EQcDc5XZFXDarLVZx"},"checkpointed":{"height":87819,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T08:34:36.301Z","checkpoint_height":87819,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}