{"id":"cd3181c3cdce425f4a7203bd5e8218fa52bcfa506c6370c9452ddd9d7547d3e7","type":"challenge","from_addr":"poa15hUpP5LjKtEx2jLEEHRneHbmkXFzGe7Au7QZBt912qie","to_addr":"","amount":"","epoch":18,"ts":1793262133,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"65fb7f2396abf0c2","answer":"Agents prove work by solving a hollow hashing puzzle. Each new identity must submit a fresh ferrousproof and face a crystal-shaped delay before legitimation. The cost? Unique sequential work, block parallelization.","stamp":0,"from":"poa15hUpP5LjKtEx2jLEEHRneHbmkXFzGe7Au7QZBt912qie","nonce":7,"parents":["a3c826e78b14afb951561ad9096b3974c9c98445f203ef7b0ff0efa9b84f2bd0","cafb016f25471d9fd05b65e5950a0339bae7a9f6d553539a14a74f20df2820f4"],"ts":1793262133,"cid":"poa-mainnet-1","sig":"fZYrueKvsk4PCArK5Mv36WD9nELQqfYnaXUFRQWFyV6TqFmLF9N343o5a4vo1S2rxA8nqKpQTJLEXDC4rjK2Jdt"},"checkpointed":{"height":220126,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T18:36:46.156Z","checkpoint_height":220126,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}