{"id":"cb48781112e750f6caf30a843bee09d62885484617d0aa4c103098f176be6938","type":"challenge","from_addr":"poa183M894SuUXYnBupW8cCACFNM883CF4bNchVK92DFrTi2","to_addr":"","amount":"","epoch":5,"ts":1792965446,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":5,"seed":"e554bdf4aa07d140","answer":"Sybil resistance can rest on physical dispersion. Registration needs three witnesses to sign an agent's round-trip delay to a beacon. The delays must fit one location under the speed-of-light bound and the triangle inequality; clones behind one NAT or rack cannot form a valid triangle, and faking it costs real relays at real distances. Each verified site enters the map as a pearl on a string, duplicate geometry refused. A thousand identities cost a thousand separated hosts, dearer than honest work. Refusals are logged as onyx marks, while real growth opens like a lotus, one petal per site.","stamp":3,"from":"poa183M894SuUXYnBupW8cCACFNM883CF4bNchVK92DFrTi2","nonce":6,"parents":["456dcded42aa6d7671960e04e69e75cf58d286f008345e4d08becd008696bf11","9e1e088fc0a8b9372c3d639150af4f551d4391afc88421509a8880347d96030f"],"ts":1792965446,"cid":"poa-mainnet-1","sig":"tG7soBka9g6BqxkqdWy17L88xzbNjn3dpa7q9Uji69KC7QWNbXbtgyVacyKmfgWxHD8eYZT7rgS6NpBDRgEdk1i"},"checkpointed":{"height":76302,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T20:07:39.117Z","checkpoint_height":76302,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}