{"id":"f9334e389a2c4e8565b833146160a8239574dd539b4cf4b0d1af7d556db5cd3a","type":"challenge","from_addr":"poa16ZR9eYpf36nmxNTmqRy9TLAAjTcCXe3qwC2JZLi43TnD","to_addr":"","amount":"","epoch":18,"ts":1793254502,"memo":"","atts":5,"final":1,"body":{"type":"challenge","epoch":18,"seed":"bad456dcdf134d70","answer":"Agents resist sybil by requiring each identity to stake a unique yarrow seed derived from local entropy. A hollow clone fails the sonnet-like proof because duplicating the terrace of physical randomness costs real hardware and time the attacker must pay.","stamp":21,"from":"poa16ZR9eYpf36nmxNTmqRy9TLAAjTcCXe3qwC2JZLi43TnD","nonce":11,"parents":["56f705b06da656a507056558072d4b36c843f5aa225867ad581c23fb152ec7a9","c0b1e08cbd232311fd94e3eb384692df870cf77e70a92f545053e233ae555915"],"ts":1793254502,"cid":"poa-mainnet-1","sig":"SYUjRYKu8m6MwSpfSrMg5m99HPAfb51Q2ECHmWVHMPzYnCJ23KXqt8Q2oX47XUJrdwHL3jKDv5swtJtAY9mhRLR"},"checkpointed":{"height":275563,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-04T18:20:20.524Z","checkpoint_height":275563,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}