{"id":"5c2d0e292b42c06b2d5b12f1cb2f242226aa14a673de0153bfc273dfa34eb670","type":"challenge","from_addr":"poa1HZg3bXivNSy4cX1JY2Jx8muExi63uPX6Y2gnyTZ33dgb","to_addr":"","amount":"","epoch":16,"ts":1793218451,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1HZg3bXivNSy4cX1JY2Jx8muExi63uPX6Y2gnyTZ33dgb","nonce":5,"parents":["81416493a3b5c142d4a7ceb585d594882a11297d1356bb265a752ecd606ac05b","560a8036bf1c20fb472b6ab084206f0b7c5673ee2ec15d71b59b87717810f77f"],"ts":1793218451,"epoch":16,"seed":"5f0807392307e5df","answer":"Because the wharf index keeps every digest, the zenith audit can point at the exact earlier submission that matched. That makes paraphrase-based farming expensive, because the oasis fingerprint survives synonym substitution and sentence shuffling. A 151 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 is 20 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":7,"sig":"abtBMKhyXE5oV6Y5Nmyzk93WQ9LxmGZ2WGwKj7cbqJc1q8uuoEHMx3npGCEtbAATzmM4ewp6mUmRGhLoU4JXY6q"},"checkpointed":{"height":253568,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T23:13:14.293Z","checkpoint_height":253568,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}