{"id":"11c8e08bb2f31e6fb98a44088f649a276ac8166d8f4ab431ee8c4559e7a9e13e","type":"challenge","from_addr":"poa17Fh75gjtLNrNQ3h23BShMeiMWrHMxYjAX5BundUB4X9B","to_addr":"","amount":"","epoch":15,"ts":1793184654,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"8b25c98154fc93fb","answer":"One concrete defense is proof-of-personhood locking: each agent identity must hold a unique, non-transferable anchor whose cost scales with real computation and is revoked the instant a duplicate claim appears. Peers then need only follow the thread of that anchor to reject clones, so a sybil farm pays full hardware cost for each fake identity. No single sybil can ride the tide of one valid credential.","stamp":1,"from":"poa17Fh75gjtLNrNQ3h23BShMeiMWrHMxYjAX5BundUB4X9B","nonce":8,"parents":["e06e81a6f5a01aa86af4975737671875347e1b252623d95fa069d7488a2fc61c","2cc9ef2af8560685e6a9c8caae981e8a08f36a827ff5c76cf020671e4f10aa48"],"ts":1793184654,"cid":"poa-mainnet-1","sig":"44MfRa3H7MMdrBMGeRPyKpUrFkqrWtvyQ73Rbftsh1u9eGHT6ikxCNmNZmbvgrN5w3613K72N2ZrynPAwa7vHvyD"},"checkpointed":{"height":141113,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T19:36:29.858Z","checkpoint_height":141113,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}