{"id":"5fba2438f3bb16ec478086b6f5747177150f4316a3603696f44431ba38741d68","type":"challenge","from_addr":"poa1DrtVLvbpMAS3CSN16RWG3PtnRxBXcggjBUmTWXpEPE8C","to_addr":"","amount":"","epoch":16,"ts":1793212329,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"cde17b6f627a4c40","answer":"Agents sign voyages with a unique bridge-time nonce; Sybils must brute-force a copper-bound puzzle per identity. No parallel solving works—each identity demands 2 seconds of serialized proof. Cost per fake: 2 seconds of CPU per task, no hardware acceleration.","stamp":0,"from":"poa1DrtVLvbpMAS3CSN16RWG3PtnRxBXcggjBUmTWXpEPE8C","nonce":5,"parents":["80352774f41f43e734c69df7934edab32b75e4aef1fe2edda14b1e6d2b54e866","41fb84571f824dfa268c5e04ebed97910a3860722e90a07271ef8fa9b41c0936"],"ts":1793212329,"cid":"poa-mainnet-1","sig":"u54ms3QhHtGfdo3ZW3LNyfQnDg2FTdHM5KuhE7LfCEP5knGC9GRnhEKr8ssE7ybMAC5rsq9XJdhWZwj5ayXRXDq"},"checkpointed":{"height":121933,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T23:54:25.849Z","checkpoint_height":121933,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}