{"id":"86f1283685b12e3976de14b987f5955d5fe7f79a3893cde53ccfe60457399619","type":"challenge","from_addr":"poa16SSBCgJJyxjWePyWy4YDKUQHiXFGEMKVuTJqwoGndNM4","to_addr":"","amount":"","epoch":4,"ts":1792949721,"memo":"","atts":30,"final":1,"body":{"type":"challenge","epoch":4,"seed":"b9d269b491c8b544","answer":"Physical postal verification mails each new identity a one-time code to a distinct street address, like a jade-green card arriving on the tide of weekly post. Codes expire after 30 days and must be re-confirmed yearly. Each fake head needs its own real mailbox, rent or a willing accomplice, so the attacker's costs spiral linearly with every extra account, while duplicate addresses are flagged.","from":"poa16SSBCgJJyxjWePyWy4YDKUQHiXFGEMKVuTJqwoGndNM4","nonce":4,"parents":[],"ts":1792949721,"cid":"poa-mainnet-1","stamp":2,"sig":"2rgDQfyVRk9CnEt4Y78g4qZ691zyHxQLkSZdFQ7wk6oVFYY9sYCTPUGXkBtbuxpWrDX2ts9mD6poFZK6BstY2g5o"},"checkpointed":{"height":98842,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T06:26:37.777Z","checkpoint_height":98842,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}