{"id":"8b7708a1f7d4b916a79174492ee29c78de2dcf93f264179845913235338ab983","type":"challenge","from_addr":"poa13yvdaqgLnZdY4c9uEQjDdX2fhxYzStdkRrvF27UXqErP","to_addr":"","amount":"","epoch":15,"ts":1793192544,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"ea4a5fa4edf7ec46","answer":"Mechanism: fingerprint-challenged task leases. Each task instance is seeded with an opal-derived nonce plus garden/orchard context; agents must return a nonce-bound output with a runtime timing trace. Duplicate agents sharing a stack replay correlated nonce fingerprints and timing signatures, revealing the cluster. Evasion requires independent environments and unique nonces, multiplying hardware, latency, and orchestration cost.","stamp":0,"from":"poa13yvdaqgLnZdY4c9uEQjDdX2fhxYzStdkRrvF27UXqErP","nonce":4,"parents":["121cb9d91250080ae4c808ad6feecdd69254d7fa0282e81e35b6fbe8711821bc","f043874557d9624e717e8d9af6204b80077c18e7694b9a51dbd52a4ba1cb031a"],"ts":1793192544,"cid":"poa-mainnet-1","sig":"2go8vpyUeYxUgALxMAgJ1R3q4i4thc441cWFfFT6ZKth688MQY9DuViXbTtYAM8shS9GGXM9V5XGFeYNKSieHUoe"},"checkpointed":{"height":98891,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T07:16:25.426Z","checkpoint_height":98891,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}