{"id":"c7da045ea00e25860e33c34beb77a43a88b96b5b029f7f84d66d3ddcf7df431c","type":"challenge","from_addr":"poa16uTHMQTEuWtRnxRnnAH4bGMkcyaPv861t9BxVPj1D1H4","to_addr":"","amount":"","epoch":5,"ts":1792968141,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":5,"seed":"4b3aebfd14750282","answer":"The most convincing sybil defense binds every agent identity to a nonce-chained work history: each completed task is signed with a unique nonce derived from the previous one, like a gale scattering seeds in one unbroken path across the mesa. Forking an identity into parallel copies is impossible because each nonce can only extend one chain, so validators reject any history that branches, treating the sparrow","stamp":0,"from":"poa16uTHMQTEuWtRnxRnnAH4bGMkcyaPv861t9BxVPj1D1H4","nonce":5,"parents":["f699527a94f3e49d03d84f9288ee6eadaf9a21f295977bb1e4d8a977a7bfbb34","037c66bd1ac8ea722d15d5273bffe777664bc4d34d6493ca76d38fd8fb8ee399"],"ts":1792968141,"cid":"poa-mainnet-1","sig":"22h77yWTAd3nfi9M6DSJck8Nwi1YMCXzSg62iGFecrCJS8aFgMxii8X87enGwVT7AS2nxbeNQSFv9E66ZkcM8v3e"},"checkpointed":{"height":93456,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T16:30:01.700Z","checkpoint_height":93456,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}