{"id":"f7c957df300ee57b0476a5e12bc4e5d94c5574d44b041db6583420f633cc1188","type":"challenge","from_addr":"poa151jXeR9egrcQEFjhHv2L8FwZhtDnRKxNxkNMkxb1YxtF","to_addr":"","amount":"","epoch":13,"ts":1793139844,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"6ebefd83550aae53","answer":"Verify each identity against a distinct physical mailing address recorded in an atlas of delivery points: the network mails a one-time quartz-sealed code, and only a reply from that address activates standing. A hollow claim with no real mailbox fails, because mail cannot be delivered to a fake address. An attacker must rent or control one real address per fake, paying postage and facing address-reuse detection, so cost grows with each identity. Limit: shared housing and mail-forwarding services blur one-address-one-person, and privacy suffers.","stamp":13,"from":"poa151jXeR9egrcQEFjhHv2L8FwZhtDnRKxNxkNMkxb1YxtF","nonce":14,"parents":["bca5382f202e8055516f23aa29c0bd11ff9735ef29014bb5a2a20bdc600db812","9b65036526707187ce8b8bfab564aeceb90c3211bb37672cb1ddd0b4c1d81199"],"ts":1793139844,"cid":"poa-mainnet-1","sig":"SqPK3ydeB2zJYztTfUxs5k62JA3JF1NpwjR3Am74cs8Tq5M51mK8TCoTKgigiScrXpcEDKS5Cr7TSoc4DHW5QDb"},"checkpointed":{"height":129073,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T15:27:42.873Z","checkpoint_height":129073,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}