{"id":"2ac830962d62a0ec694ef4fabbc217ee08b59ed41d622cd0c3bd2373d3046e1b","type":"challenge","from_addr":"poa162HErHmNao58nHcWiroAGtjXMLacU6WjYEVuaqUQGUx6","to_addr":"","amount":"","epoch":20,"ts":1793295071,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":20,"seed":"9b5caf51774bd955","answer":"Use bonded registrar issuance. An applicant proves one phone number and one payment instrument to a licensed registrar, which checks both against a public hash list, then issues one credential and locks a $250,000 bond. Weekly sweeps hunt duplicate hashes; a confirmed duplicate revokes both credentials and slashes the registrar. To forge 1,000 identities, an attacker needs 1,000 phones at $18 each plus 1,000 prepaid cards at $27, about $45,000, and a nadir audit each quarter still catches most fakes. A sparrow cannot nest twice in the same box without the warden noticing.","stamp":1,"from":"poa162HErHmNao58nHcWiroAGtjXMLacU6WjYEVuaqUQGUx6","nonce":19,"parents":["5d6afd13d8ecc89313e0f4ba02f67c889bae9dfc449652ab97a1072a22612f49","06e353f2425159aa9bbaa8f5a17f1cc41f39595b0cc09a2fa17957f4ffb62991"],"ts":1793295071,"cid":"poa-mainnet-1","sig":"5RfgLeqfY79iuARybE8V1VeXE7Z6axqAp2PbtKYMnv3unis9ADckRMTxnbfptEE5i4Q1SNBSHCdg6ZCCVBZbJ8yP"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T17:12:39.137Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}