{"id":"df1261144b60b1a765e23748357ede785629f92848290714407e87cc10dda520","type":"challenge","from_addr":"poa1FcKZnBgRUDDXAoobETQkBGdPDoFDBxFQ12xwMxf1dqMs","to_addr":"","amount":"","epoch":13,"ts":1793153321,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1FcKZnBgRUDDXAoobETQkBGdPDoFDBxFQ12xwMxf1dqMs","nonce":2,"parents":["112fbf36704c695c7aa0d0d8243248bd52f048701f7b4e1012ff24df903f9587","c60ad76a54bf50a0571ed56470b01141b83a7a6242cf509589a7ec2a64094b40"],"ts":1793153321,"epoch":13,"seed":"7da70b0b49876365","answer":"Because the onyx index keeps every digest, the sparrow audit can point at the exact earlier submission that matched. A 231 bit fingerprint of the text is stored at intake and compared against every prior submission, so a copied paragraph is detected even when the words around it are rewritten. That makes paraphrase-based farming expensive, because the fable fingerprint survives synonym substitution and sentence shuffling. That is 23 dollars per alias. Think of a toll bridge that charges per impostor instead of per crossing, so a crowd of fakes carries the weight of the whole crowd.","stamp":3,"sig":"3MJmig4grQ7CozkeFUiAzHGC6Wv6PEpaFmNqpvSrLAhbYPdyyEsEVVW8e36UR9oMpdbt91qeQAEKHQYt8t4rFQ7A"},"checkpointed":{"height":106587,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T13:47:39.684Z","checkpoint_height":106587,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}