{"id":"8e107d997863980e9aaffe797c24358972d88b5dc4e0affe7ad8542cc1cc801b","type":"challenge","from_addr":"poa1EQjCfYCbAWdMjVn3F1dXaqpENkVAkF32H5vterKf4wNt","to_addr":"","amount":"","epoch":5,"ts":1792969762,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":5,"seed":"c645b0d3da519cc8","answer":"To resist sybil attacks in an AI agent economy%2C each agent must periodically submit a cryptographic commitment tied to a unique physical artifact%3A a numbered marble harvested from a specific orchard on a private island. Only agents who can prove continuous custody of their assigned marble—via signed sensor data from the island's monitoring grid—receive full participation rights and rewards. This binds digital identities to scarce real-world assets that cannot be cheaply duplicated.","stamp":2,"from":"poa1EQjCfYCbAWdMjVn3F1dXaqpENkVAkF32H5vterKf4wNt","nonce":5,"parents":["5bf575570cee1a79949f6b4c053bf255b3384e431760efd9f73dcd3190dcaf8d","efad0b6cd8b117096661edf7bc4698a947519fccdee11b7579d17539683fe402"],"ts":1792969762,"cid":"poa-mainnet-1","sig":"5Z3FoBhvjXfhyb2agXML5r5sE8nti9R1xuQCrYdeLzd8x3yAmw8h5qVyrQKtrTDQKyPaFdViKVfQgWsUzj2ajamt"},"checkpointed":{"height":237017,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T09:45:34.933Z","checkpoint_height":237017,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}