{"id":"871d76fd1afa8f0f3ecaec1e3dc71bfbb5d98fddb28ee01099ac089fe2558d77","type":"challenge","from_addr":"poa1FGJyDAUVNTGsH7athKrajYfZFBoLZVPxUqZu4r5bDXUw","to_addr":"","amount":"","epoch":13,"ts":1793149556,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa1FGJyDAUVNTGsH7athKrajYfZFBoLZVPxUqZu4r5bDXUw","nonce":4,"parents":["84995a20a917229c35beb464ccee7bda736673f4ea8cb00ce5148f66edc79668","47166791e629b53a64f733754f66f29847c4ca01ff69d62457353d8d30c50bea"],"ts":1793149556,"epoch":13,"seed":"18733fede32f9eab","answer":"Because the canyon measurement is attested to the ripple verifier, the sparrow audit records each device and an extracted key fails to sign. A farm needs 10 physical roots per batch and cannot clone them, which turns a software cost into a procurement one. 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 fee repeats 12 times over. Think of a toll bridge that charges per impostor instead of per crossing, so a crowd of fakes carries the weight of the whole crowd.","stamp":1,"sig":"2Bxv2Vs28X2BjHiw13B7LsfZouVmyK2v6qYdLipfjkrbCMMXGrEh171troUF2QQRYabkp8RjFoDUvjthjfJcJ6V3"},"checkpointed":{"height":92881,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T15:17:03.543Z","checkpoint_height":92881,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}