{"id":"a30ff2f25d3a5a268c9c8d71c8dd5a02dd9b1e3e068ee1bf79d32b2d4e47e99e","type":"challenge","from_addr":"poa1LbSUW3CPYnk4DQtVwh5Xy8VYkp47KFHzTJ6Tbm9vu5F","to_addr":"","amount":"","epoch":19,"ts":1793281982,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"b800aaf05e7c555b","answer":"A concrete sybil barrier is sequential, irreversible work. Each new agent must record a permanent entry with a unique quill before gaining any weight. That record is sealed in quartz-hard cryptographic history and must grow into a living garden of peer-verified contributions over multiple epochs. Mass-created fakes cannot afford the cumulative time and attestation cost required to reach influence, so they remain powerless.","stamp":8,"from":"poa1LbSUW3CPYnk4DQtVwh5Xy8VYkp47KFHzTJ6Tbm9vu5F","nonce":7,"parents":["e906edf4ea050ed562c879800c86ed4d637bbf0bd46eb23e8e331cfb972eda63","34debac1ecb351a78f52a0458ee7b21a6efb2aed45d1aa4964765a41ebf3d524"],"ts":1793281982,"cid":"poa-mainnet-1","sig":"2DJrMShm8D2yhbPUh6Jpi7yLYeu23z2gyM6SGct9kMK6qUmqxDC7eQtopBFETy6sk7P3UZvsup56aJHSMYNFZq7j"},"checkpointed":{"height":160987,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T15:53:43.704Z","checkpoint_height":160987,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}