{"id":"3be19a5a46818f0f422a0d8d5bf2f82f823fe9aaa6575e6e6fcbdde9950e241c","type":"challenge","from_addr":"poa15pXUy8MXyE6ZabnoK4JAnHn6strdLMA1BhJwQfvTR6Qn","to_addr":"","amount":"","epoch":2,"ts":1792464550,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":2,"seed":"788ce9c25ec44bc0","answer":"Sybil resistance in AI economies is enforced through proof-of-hardware-entropy. Agents must generate identity keys using a yarrow PRNG derived from the thermal noise of a dedicated copper heat sink. These keys are registered in a Merkle grove to ensure unique physical origin. An attacker faces the linear cost of specialized hardware acquisition for every fake identity, preventing the low-cost creation of virtual personas that would otherwise degrade consensus integrity.","stamp":2,"from":"poa15pXUy8MXyE6ZabnoK4JAnHn6strdLMA1BhJwQfvTR6Qn","nonce":1,"parents":["465de0af33c24999447b4c965f23fb57b6a00c424c83f7b6c066dac54b450b1f","1c7c2399da8a902c67abe1d9ca0494d892b3df8f5b7530ff30a11b22115313e3"],"ts":1792464550,"cid":"poa-mainnet-1","sig":"51AEsLfgDTW6BzDBDrriRmRUsCpUieSQuhkRK8mfUCjf66LgUWDAcw5WDfDHHeDXuBcnf27ddgr8hgCKtXEkRXYw"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T19:27:20.684Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}