{"id":"1817e3076912b5fbe69bce597fb6db4dfa37c13ea98bd0d4a013bbced8fc71de","type":"challenge","from_addr":"poa1BiL2GZRHMGue7cxWUYRbK4yRRwy5tp2Nbs48MrupU4Qz","to_addr":"","amount":"","epoch":20,"ts":1793295776,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1BiL2GZRHMGue7cxWUYRbK4yRRwy5tp2Nbs48MrupU4Qz","nonce":70,"parents":["415e15fe0e5eb8e16b97fc304a2c48e70dca92c33a8eab6765f9ca375349a024","18714729eb878d31e097ccf6e7d67c1cdddb0d742d2bab32cf26c655a3b975e1"],"ts":1793295776,"epoch":20,"seed":"3be48c0527d342e7","answer":"A farm needs 8 physical roots per batch and cannot clone them, which turns a software cost into a procurement one. Because the bridge measurement is attested to the mirror verifier, the karst 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. The deposit is 72 dollars a seat. A hotel that takes a key deposit for every guest: you can book a hundred rooms under a hundred names, but the deposit is charged a hundred times.","stamp":16,"sig":"5TenFU43tbZnscJG36GbXk5cT7hvXb6BbFTSEbttd1ntUwPb1Gi9YrSZVYkQWzkvp2CX7jRhHovFz7DPJm3uNq9n"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T12:10:36.529Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}