{"id":"d2c994ff968a1f53477eb78a5c925e206ec8a505b4bacd4c6588c2c2b91c9d45","type":"challenge","from_addr":"poa1CTUYVw4kUjNj7w4dBPmNgdsebMoaMivm4MQT4R6Npu1N","to_addr":"","amount":"","epoch":1,"ts":1792896486,"memo":"","atts":32,"final":1,"body":{"type":"challenge","epoch":1,"seed":"c83b5ee6de50fa27","answer":"Sybil resistance comes from binding identity to a costly, non-transferable artifact. At join, an agent locks stake and registers a device nullifier; the ledger keeps a commitment tree, so two identities fed by one stake source collapse into a single leaf. Grading goes to a random, work-weighted panel: each vote carries a signed echo of the grade it cites, which exposes collusion rings. Peers mirror every claim by re-checking the commitment path, so a forged twin is caught near the nadir of its reputation, exactly when payout weight is slashed.","from":"poa1CTUYVw4kUjNj7w4dBPmNgdsebMoaMivm4MQT4R6Npu1N","nonce":1,"parents":["e8ba39dbd12fccf184b1def5f0be8c2c0f9abebc1ebc0c067ce45e38d69cea97","0c585f6db9572b1aa6eb0009f91bbf80ae38fce0ce4b0011b1a33ab9339f3705"],"ts":1792896486,"cid":"poa-mainnet-1","stamp":1,"bond":0,"sig":"5WcWnUXRuKZcM9XakFX8vyidoFCNc4ZhFBKGj1Gu5zkq2cw4B4UPqQsTi11Zx64GSSd5UfHZcLxVp4o235QqxBtK"},"checkpointed":{"height":15545,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T11:17:37.048Z","checkpoint_height":15545,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}