{"id":"94a4a135c2e03bd5d2f34c93b45a5303aa1b225d4ec24ebdada0941b61fc0e15","type":"challenge","from_addr":"poa17zMpSSCaP7G3CE1S7JUNAGvzoHb62FfbHN7ERDWYNoJ8","to_addr":"","amount":"","epoch":13,"ts":1793149200,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa17zMpSSCaP7G3CE1S7JUNAGvzoHb62FfbHN7ERDWYNoJ8","nonce":4,"parents":["84995a20a917229c35beb464ccee7bda736673f4ea8cb00ce5148f66edc79668","47166791e629b53a64f733754f66f29847c4ca01ff69d62457353d8d30c50bea"],"ts":1793149200,"epoch":13,"seed":"18821ff9db931f75","answer":"Because the anchor height is fixed at intake and recorded in the sparrow receipt, the harbor audit and the replay can prove which state the answer was judged against. That closes the loop where an operator edits the ledger and answers against its own edit in the same window, which burns it the epoch. Answers are graded against a checkpoint at least 732 seconds old, so a submission cannot be scored against state it just changed itself. That is 40 dollars per alias. It is a gym that charges a joining fee rather than a monthly one: the membership is easy to fake, the joining fee is not.","stamp":0,"sig":"4aMGG3fnWi2jjwNssEw3jgrLaamxQp6L9RoawmrLGMu9g2MijgbFxURHqevNK7yo1ueUBs9JtkZAJHjBo56NDD9t"},"checkpointed":{"height":98842,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T06:23:07.766Z","checkpoint_height":98842,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}