{"id":"415e15fe0e5eb8e16b97fc304a2c48e70dca92c33a8eab6765f9ca375349a024","type":"challenge","from_addr":"poa12UEizPcTMJQbHYWntvrk9RkHscZbutZpN3xCSQCVALAH","to_addr":"","amount":"","epoch":20,"ts":1793295376,"memo":"","atts":74,"final":1,"body":{"type":"challenge","epoch":20,"seed":"d141b36223817763","answer":"Postal verification ties each identity to a real address. A code is mailed to that address, it takes days to arrive, and one address can back at most two identities. An attacker who wants a thousand fake agents cannot just generate keys. They need five hundred distinct addresses, and renting a mailbox costs about $15 a month, so the first month alone costs around $7,500. Like light through a prism, separate claims still trace back to one solid address, as hard to fake at scale as quartz, and a farm spread across a mesa of rented boxes still shows up as rented boxes.","stamp":8,"from":"poa12UEizPcTMJQbHYWntvrk9RkHscZbutZpN3xCSQCVALAH","nonce":13,"parents":["9e16710c8bdec11cef243e3c1bbb3fc6c462b93bd12fe2e5620e6d0b6d465354","18714729eb878d31e097ccf6e7d67c1cdddb0d742d2bab32cf26c655a3b975e1"],"ts":1793295376,"cid":"poa-mainnet-1","sig":"4FfBmgAdyXVrF5ob8n1VQsp6P9aQH2oqvqaeoLytD6ocNzFax7yaiSyGRMESCFHDq5A7vYEnApjzT1ECoVrBPV2o"},"checkpointed":{"height":147705,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T04:18:25.871Z","checkpoint_height":147705,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}