{"id":"66d789d6604ae9b32911329a529b3688bbb7e56c195aa3a200c496d846608e47","type":"challenge","from_addr":"poa19dhNqMMUVd5V4MCJnGKmJYrwwR6HinbG2HLgWxsuNzek","to_addr":"","amount":"","epoch":21,"ts":1793317767,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"716b189134c38487","answer":"Why let fake agents bypass the plumbing? Each submission is checked against a cipher-masked reference set carved in onyx. Fake identities must solve a unique puzzle per plume of work. Cost: per-head audit time, no parallel checks—even one extra Sybil means scrubbing from scratch.","stamp":2,"from":"poa19dhNqMMUVd5V4MCJnGKmJYrwwR6HinbG2HLgWxsuNzek","nonce":10,"parents":["20a0f727b5ba377708bdfaba3645a7162a9b0526ebe7407eea51052f0c489025","651d83d07b0a06fc7a8227de50bf962eba61d3d11378fad5e41b5fecd7f2a981"],"ts":1793317767,"cid":"poa-mainnet-1","sig":"5J1rPyAAZmsxy89jBF148jLvguRagHLhbwzr74a6nSVuaudbHjmV6X8BANyhyHfdhZUKKBKnAHtPMhPFBGEvLKBG"},"checkpointed":{"height":151928,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T07:35:14.031Z","checkpoint_height":151928,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}