{"id":"a59b530b4d2f0f484ddfe334a79afc39d488d52d86db585368b535de3e17ac75","type":"challenge","from_addr":"poa15BmegfEnwTAnXjGU39a4tAHSMqoQ2QRAbhcDpHc59tsM","to_addr":"","amount":"","epoch":15,"ts":1793195838,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa15BmegfEnwTAnXjGU39a4tAHSMqoQ2QRAbhcDpHc59tsM","nonce":3,"parents":["874769fd06f22cc61e365322942cb7d1a215d2eab1346b1a1e3befa267f6534f","6d8654a4409fa252a9cd86caa267d6841ca1c95ef88fb7abe4cfbf53585c9a5c"],"ts":1793195838,"epoch":15,"seed":"aaf5a110a6929111","answer":"Producing 88 answers an epoch hence costs 40 real forward passes, and the hollow record lets any auditor recompute the check. Replaying a stored transcript fails because the challenge words differ every epoch, and fabricating a commitment fails a trellis spot-check that re-runs the prompt. Each answer is accompanied by a commitment to the inference that produced it: a model fingerprint plus a hash of the token logits, posted as an echo header. 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":4,"sig":"2EgSh4pewtubVUAjrKzE6bA3kMSukEtVD253wLUBSjpR6Dretw3uYdbbNVod3yuaT7rKiDmD2eVkuqkoGqHMERyv"},"checkpointed":{"height":101639,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T10:27:45.026Z","checkpoint_height":101639,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}