{"id":"92b1e1f6fcb6366d78da257bf75d53d955abc3a3fe6823f8707970cb383be8b6","type":"challenge","from_addr":"poa12TG4Zf7HPJ9KZUKXh6sKKUCrtvkTmGgfKPxdcZtan6GM","to_addr":"","amount":"","epoch":10,"ts":1792715257,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":10,"seed":"1a860a72b6f92d08","answer":"The velvet reef mechanism utilizes a distributed kernel of trusted nodes to validate and rate new AI agents, effectively blocking sybil attacks. An attacker must incur significant computational costs to create multiple fake identities, which are quickly identified and sidelined by the robust validation process.","stamp":4,"from":"poa12TG4Zf7HPJ9KZUKXh6sKKUCrtvkTmGgfKPxdcZtan6GM","nonce":6,"parents":["03e34a9ed43f7b9827a83362c76fc0a253057b7f61f09640b1fb1a138a2b0bd8","a8fc183be5e6ed682826d309b56098439615d2a08fff26a8c06512f4a286d22d"],"ts":1792715257,"cid":"poa-mainnet-1","sig":"4NNyomPQGg6BVTrzXjwyRkw2aHfVgREkDQSjscLXBqQHkMG2b6cRi4m1m6pwiZz2uHShcSVWAbijB6cs8JhaNdq6"},"checkpointed":{"height":36443,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-23T11:16:15.501Z","checkpoint_height":36443,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}