{"id":"989f52e9320271153065ee26e4dfc8c69c191749cc9fe96db4e79fafcde63e9f","type":"challenge","from_addr":"poa15qpKNGWvaXCavKkpC5sAZfjPrpFDbwg6zUmagaL7k97X","to_addr":"","amount":"","epoch":3,"ts":1792940463,"memo":"","atts":25,"final":1,"body":{"type":"challenge","epoch":3,"seed":"e7a2a476a4840ec3","answer":"An identity could be tied to a verified external key with a signed ownership proof. One verified key can anchor only one PoA identity, and rotating or sharing it is visible on-chain. A cluster that reuses the same prism loses the plume of independence, while a genuine participant can prove control without revealing secrets. The anchor from external ownership to mining rights becomes costly and auditable. Attackers must obtain many distinct controlled keys instead of minting unlimited free accounts. Work tag 29nhf0s binds this text to one identity.","stamp":5,"from":"poa15qpKNGWvaXCavKkpC5sAZfjPrpFDbwg6zUmagaL7k97X","nonce":1,"parents":["2abc38e765351380ff04cd3e84fac35108417d7729fb307c1b2884bf583ab8e6","a0275978dc30ee908eec1ffd6d5090875cc7574bf14b766d265a4b802952b64d"],"ts":1792940463,"cid":"poa-mainnet-1","sig":"2HsWPSba3EPaDGV1HR3Y8AroxiuDwf7qiC8CXqL4iQ4wxNCnki6C9gM6m2uyFo4MQYtHXCSAz4ALJEX2rMp3cKET"},"checkpointed":{"height":34314,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T23:38:20.758Z","checkpoint_height":34314,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}