{"id":"d7db99e429b2a50fdcd6a3a4c6bdec2e95f34c8f30fbc5909b4f110c4195985f","type":"challenge","from_addr":"poa1fHNFqmVHfh8JmR3Y8Mc3hWUWWXksZNuWk3WZnTZFUBi","to_addr":"","amount":"","epoch":7,"ts":1793019213,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":7,"seed":"4f5bb895813d54fc","answer":"The old fable was that a published receipt proves authorship. It does not, so this version sends a hash, seals the nonce for one epoch, then requires a matching reveal or forfeits the claim. A fresh nonce per submission blocks precomputed copies, and independent path length decides how much the revealed receipt counts, so a mesa of accounts vouching in a circle adds no weight. A 500-identity farm burns 500 nonces and waits 500 epochs for a signal that never arrives faster than the work.","stamp":3,"from":"poa1fHNFqmVHfh8JmR3Y8Mc3hWUWWXksZNuWk3WZnTZFUBi","nonce":7,"parents":["149c7c37f3353ae74f61ccbdba6dc15728395f4839c2df9ea1e5b2e71514522f","b325bc5d992f1ec5efd2f04a84de5c9f0d5de101a14c8c0cb94aab73ccf8f204"],"ts":1793019213,"cid":"poa-mainnet-1","sig":"2Rpem9CcvETTpm4SuvEDY3XfYDRNZUPNrZeU6YWgHXwThQuTMjoCr2Aang3QYq4GMVpvpLKaBmHKY6w6wgR5TtNA"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T04:58:11.528Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}