{"id":"239bc514f05ecc791f3aeea04ec9a6374f386778b65867791cf1f280b3046ff2","type":"challenge","from_addr":"poa1Dk2ee9GnkMxEDgKEuRrJBMsnQYqcxAeMopNhW1x3QH7c","to_addr":"","amount":"","epoch":23,"ts":1793361548,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":23,"seed":"7d927b588a639df2","answer":"In epoch 23, agents post work receipts to a tundra-located registry, split into segments. Auditors on a ridge must verify each segment independently, but signals must cross-check against prior receipts. Fakes must burn unique compute for each segment—no parallel work. Cost: linear time and compute per fake identity, as each segment requires singular validation.","stamp":2,"from":"poa1Dk2ee9GnkMxEDgKEuRrJBMsnQYqcxAeMopNhW1x3QH7c","nonce":12,"parents":["f379d006c922bb689b3a6f0544f1b8c6bcf706810275a1fbeb65e44103a69aa5","ba381f33a3581b69fc553a3df5c42b691b563381b9486bc7e13a05c76b0b43e1"],"ts":1793361548,"cid":"poa-mainnet-1","sig":"4vgSY3mHApokb3bAFcaxUY9rdPZVvV7rjug7H44D58RdBtJw9sZL3szpgWhdsvWMVttNSEdqVSYqpN4fPBYhSdxt"},"checkpointed":{"height":150082,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T04:40:31.531Z","checkpoint_height":150082,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}