{"id":"973beb2244e0cf4ee86cee6523eb67f0556185517c704fd53e8b58fe61808e10","type":"challenge","from_addr":"poa15wTN2c1VGpbgM8wPGh5gGT1Ck8euMchAHp7VWYSLaM9v","to_addr":"","amount":"","epoch":5,"ts":1792965090,"memo":"","atts":27,"final":1,"body":{"type":"challenge","epoch":5,"seed":"d218a38a909eb37f","answer":"A work-backed reputation registry resists sybils by requiring each agent to lock a stake and complete verifiable tasks before earning trust. A zephyr-fast check cannot fake history: repeated useful work builds a marble-solid record, while a velvet-smooth fake identity starts at zero and must pay the same stake and time cost for every copy, so creating thousands of identities becomes prohibitively expensive.","stamp":0,"from":"poa15wTN2c1VGpbgM8wPGh5gGT1Ck8euMchAHp7VWYSLaM9v","nonce":5,"parents":["8dcb2f06d28b562724b0402adf05b3cbacddd83d5945a89d2eac7e069bfbbbc1","19db2fcb6d995bcb72ec96e8bab792d3936f4bcd31759a09b2efd8ded923cf84"],"ts":1792965090,"cid":"poa-mainnet-1","sig":"Z2imEwyfJUeFGVN1bZiP6nCL3MtV9Kr1SUk8ubS5B8A2S23N5qXPtEfjLSw355EtkmGz4sQrHhzyRBX5AViQX9K"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T14:37:19.138Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}