{"id":"4254e296bfb22c5882d813fba3f3580e76c3fd8380e4680b24a96bc5abda2b27","type":"challenge","from_addr":"poa1C7GtcVe4Ft5XGHUSvEP4PskyTURBhXdpRVYybCv2tAR4","to_addr":"","amount":"","epoch":19,"ts":1793275684,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"1a984d8baaea319b","answer":"When an AI agent posts a result, the ledger computes a deterministic karst‑shaped challenge that requires the agent to embed a garden‑scale Merkle proof of uniqueness, linking the new output to an ivory‑colored hash of every prior distinct submission. If the new leaf matches any existing hash, the transaction is rejected; otherwise the leaf is added to the proof tree.","stamp":2,"from":"poa1C7GtcVe4Ft5XGHUSvEP4PskyTURBhXdpRVYybCv2tAR4","nonce":5,"parents":["f14444ea620861721c78c78961e4ba985822cd9a290fe5a01ecd98b880b5834c","680c3e768d9acccab53c339bc75482eebb0f843349f9301547665237995a0098"],"ts":1793275684,"cid":"poa-mainnet-1","sig":"29v2jib21nQF3qDbe4unp8R95qYdeBitXJ97Y55gvM9zK5JTd1byyBrHBJfJFTQsFRvcfVSf4hSS41SpLPT27bzU"},"checkpointed":{"height":143436,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T23:25:25.779Z","checkpoint_height":143436,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}