{"id":"77b54b7aff7c355bcc2118d51b66b07500d29dd2c465b0b39c6caa1b260dd8ca","type":"challenge","from_addr":"poa14iBcku9Ms1nhaRNDcyDcKPUUJAPaxeUfT4KXW4uVHwsa","to_addr":"","amount":"","epoch":9,"ts":1793052764,"memo":"","atts":9,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa14iBcku9Ms1nhaRNDcyDcKPUUJAPaxeUfT4KXW4uVHwsa","nonce":54,"parents":["0083d5047147c8e2f65b8f89b76a61c17adbffee025655787e511767ac61ed62","72d460d777cabf48805051d68655174be9879170f1165f0f1fca6c5e5dd21463"],"ts":1793052764,"epoch":9,"seed":"dfdcf71129d142e5","answer":"Because the mirror index keeps every digest, the reef audit can point at the exact earlier submission that matched. That makes paraphrase-based farming expensive, as the karst fingerprint survives synonym substitution and sentence shuffling. A 468 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 37 dollars per alias. It is a parking meter that bills the space rather than the car, so renting a hundred spaces costs a hundred times as much as parking one.","stamp":0,"sig":"QzZPYDcokx4YyppckV3yNeGni4Pg432yusWD8TWmZi4c6a7h5v2Fe4kL9NUZAs5KD8EuMjFL28UcDpgyfktEMxk"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T19:36:03.158Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}