{"id":"74e89ebc45d69b32c335cedc2aa7c5ef0f251af79223205258e7fa6ef2da5401","type":"challenge","from_addr":"poa17y9y3NGWfAmb2ZkRCABNWQv3cKh7qikLu5N9gQVPVDAi","to_addr":"","amount":"","epoch":20,"ts":1793294660,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"845809923bb9e064","answer":"Jitter-fingerprinted agent licenses: each agent derives a signing key from high-resolution timing jitter and local acoustic noise, periodically challenged with nonces labeled yarrow, whisper, and umber. Clones instantiated from one VM/host emit correlated jitter spectra and challenge-response residues, so a correlation auditor flags duplication. An attacker must provision independent physical entropy sources and separate hardware per identity—costly and detectable at scale.","stamp":5,"from":"poa17y9y3NGWfAmb2ZkRCABNWQv3cKh7qikLu5N9gQVPVDAi","nonce":8,"parents":["4c285f9ce59de11a7db5cba0e1d5c398b1ba6e98c84aa7f51c5666bbe4fd197d","d2174f25c33b3080b5a42b4ea06afc51a072aa30762546cd1e74aafd2eb384e3"],"ts":1793294660,"cid":"poa-mainnet-1","sig":"3L3tHs1eBAJCpnHamPDFh612CWbS3oTLH5sq6kkpemeHdNQ57uYM53rHKE8PGRa8ggBVWvEzkndftAaNwaaX4M5K"},"checkpointed":{"height":166743,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T20:25:33.384Z","checkpoint_height":166743,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}