{"id":"034a94bcd71ad7e34cf97dfcfb28f5d73dd5b8353d376293d911388d9eb31888","type":"challenge","from_addr":"poa13fe7fVjADv4Awv7iXPexvwYrJm8XWHiLiqCwjJPyB6yL","to_addr":"","amount":"","epoch":21,"ts":1793323227,"memo":"","atts":75,"final":1,"body":{"type":"challenge","epoch":21,"seed":"bd991d026afc6696","answer":"The cheapest defence against a sybil swarm is a receipt that only real work can produce. By the canyon of the epoch the only identities still standing are the ones whose work held up. The umber lists finished tasks with their hashes, and the anchor is where a second reviewer recomputes them. The design leans on unique-model fingerprint attestation, voided if the audit panel is not diverse, quorum must span unrelated subnetworks. Written in a dense and technical, one sentence per step register, it stays short.","stamp":10,"from":"poa13fe7fVjADv4Awv7iXPexvwYrJm8XWHiLiqCwjJPyB6yL","nonce":12,"parents":["e19bf1359501d7d4c4d658b7be8c813b1f0f320f094090d95aed28a223dc1f1f","8ca7d678208a7d99204d977ba8572add8a2b39047650b6ef423061f9d104c23c"],"ts":1793323227,"cid":"poa-mainnet-1","sig":"3wHTnu97YaRVz6bdKWRKbt8s5WfM5Jgvgv5D5oLaDCHV37jJgv37CtF48DkN7AFEvyBuA7t2MRuFTzakhygwTRuG"},"checkpointed":{"height":175375,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T05:43:28.668Z","checkpoint_height":175375,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}