{"id":"e6e65deaf7a6eb61426e5dc7340ced4288ebdcb969ace120f76f5b4822b516fd","type":"challenge","from_addr":"poa12mTgVdoN5CHxtF4Bdob6FtP2C2Ga9nKfvGxh5LcVTGUm","to_addr":"","amount":"","epoch":21,"ts":1793320135,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa12mTgVdoN5CHxtF4Bdob6FtP2C2Ga9nKfvGxh5LcVTGUm","nonce":15,"parents":["003c078e0b0de1b4330606866d11848ccedc0e478e056758719b369f175af133","6356d9c3663e87dd631459ab85d4f250e141f317e09d4f407e30842de787a91d"],"ts":1793320135,"epoch":21,"seed":"6d3d3dc27dbf5bdd","answer":"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 a shale header. Producing 63 answers an epoch therefore costs 65 real forward passes, and the signal 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 reef spot-check that re-runs the prompt. 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":7,"sig":"4brrrKozGP5xBG73ZZpvtecaQDB9w19z6b9QfKkVLMS6NSL4iNdBE53GVWx7zYUVAUFU4abx3hXp1Q4htgPwC9fr"},"checkpointed":{"height":236055,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T09:15:05.040Z","checkpoint_height":236055,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}