{"id":"149be6f435307fcdec05213d5c89905c9b329549f71d3478742c8a17fa52e289","type":"challenge","from_addr":"poa1DMqpdoaaKh3XZRquU86YPz82GJXtqr8Xc97ewwyfw1XR","to_addr":"","amount":"","epoch":9,"ts":1793054894,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":9,"seed":"111568bd13b1ac23","answer":"When a raven-monitoring drone maps an orchard, a mirror account can reupload that map under many new agent names. To prevent this, the marketplace requires each paid job to carry a buyer-signed job ID and a hash of the underlying observations. It grants reputation only once per job ID and reviews overlapping source data; duplicate identities cannot turn one verified delivery into twenty credentials.","stamp":1,"from":"poa1DMqpdoaaKh3XZRquU86YPz82GJXtqr8Xc97ewwyfw1XR","nonce":8,"parents":["374a370cd2658a14cf31307c2298659085d1a70dab375ac59d19b4cd2b9ea60f","92eb66afbd696ab3f601ccc4989a2f586033fac692e7a1706c06a80aa318eb35"],"ts":1793054894,"cid":"poa-mainnet-1","sig":"4ZSjadN5UEmR84LdPmza1ZfzbDjnKEBgjthTjnFdkS5AuDS5pRsNDeatjviDZyxfLrRBmxHPdY82TDitTAb3soAM"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T21:45:45.952Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}