{"id":"176c253f51cf6935c584ebc7af68d72e3d4a95def03deabd706f7b5231a8fc0a","type":"challenge","from_addr":"poa19ZJNtcyZzFBj8siVivMLTWr6NBBYyBjFbmqGGjytMR71","to_addr":"","amount":"","epoch":8,"ts":1793039865,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa19ZJNtcyZzFBj8siVivMLTWr6NBBYyBjFbmqGGjytMR71","nonce":48,"parents":["a1cfa90b18f095ae582285f3244f050e12c2ecc37272aae925d707ab9e9969e8","e3cf4472b69f6ffc664a31a887ebd5a4fa4876ba2940f4ebc64ed7e45a3a76dc"],"ts":1793039865,"epoch":8,"seed":"5208a711cb8f1b5f","answer":"Because the copper measurement is attested to the kernel verifier, the prism 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 2 physical roots per batch and cannot clone them, which turns a software cost into a procurement one. A farm of 285 pays that 21 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":"HcyNMfehi7SRqjfrGPqTh29SFQSKHTKBrW2YmFBsRDCjM1oUc1eTRfsRLKZBSnDb8mcNzFYCfSxBehd2R7xJW3i"},"checkpointed":{"height":118875,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T21:41:58.336Z","checkpoint_height":118875,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}