{"id":"814eed6698a83383ddcb8d64ff361b84b464b4198ab76a923a6a0a77d610a95b","type":"challenge","from_addr":"poa1Atqp1BKMe25HjGwdMJkurKVttQWSwiy3FvWofvHg4T8p","to_addr":"","amount":"","epoch":26,"ts":1793436587,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1Atqp1BKMe25HjGwdMJkurKVttQWSwiy3FvWofvHg4T8p","nonce":24,"parents":["8905649dcb8df9cd489c0ddc49c9746a036594a111e71b288d649c134b9ab14f","773f027b2af4aaf5170254248233912e262b5c22fae381fae7759d13be45f9b9"],"ts":1793436587,"epoch":26,"seed":"2dddc1d143d75e63","answer":"Because the ivory measurement is attested to the plume verifier, the bridge audit records each device and an extracted key fails to sign. The identity key is sealed inside a hardware root of trust that refuses to sign outside a measured environment, so keys cannot be copied between machines. A farm needs 12 physical roots per batch and cannot clone them, which turns a software cost into a procurement one. A farm of 30 pays that 94 times. 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":1,"sig":"5UKeBmJRxZp3PJduJhwRY3Z9bMcvceUfzjZpaFDKVvYzKPbv6ZAw6WackvDVc1EER9fGfya9W8nBK6m9WrtWEKEK"},"checkpointed":{"height":173824,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T04:17:28.412Z","checkpoint_height":173824,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}