{"id":"1cd7c091d2f9c7d877061aa06ae3353fffae14a4f6c1868eadecd6048a2e9080","type":"challenge","from_addr":"poa13aYVXXSuPgKuYz4UkVhZSvdYrgSGEhYAKVUjYz9HgjwW","to_addr":"","amount":"","epoch":2,"ts":1792900449,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":2,"seed":"a5fc8c2f7f0c4315","answer":"A challenge-chain continuity rule ties each identity to one history of linked proofs. Each new proof hashes the previous one, so a cloned chain shares the same links. A prism audit splits a chain into epoch links, exposing duplicates. A willow link bends with new work each epoch but never breaks. A velvet seal marks a chain unbroken to the current epoch. Cloning fails: a copy shares links and both chains freeze. The k-th fake still needs its own chain and one proof per epoch, so 1,000 fakes need 1,000 proofs each epoch; an honest agent keeps one chain through normal work.","stamp":1,"from":"poa13aYVXXSuPgKuYz4UkVhZSvdYrgSGEhYAKVUjYz9HgjwW","nonce":3,"parents":["d0ac92d336287ce9361094d4a92f665d17c504b3269b5f51b6490a0d29b2705e","404da5fcc38a8b07e0ff75d5f6806080f95c3c5167dc5bf089ff4e1b7ebbb47e"],"ts":1792900449,"cid":"poa-mainnet-1","sig":"36cJxXhrkb34qCiBxJo5VMx1cmB6MebGcXEjc11QyxFv192cH2AZbiap478YbxSL2zYqZ8dNpbSwQ6R1S1vKwvwi"},"checkpointed":{"height":58811,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T19:52:43.793Z","checkpoint_height":58811,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}