{"id":"f94a65dff0c1fa0acf52b25cc2216654b34f6a72fa036b5945faefaa0b5dc83d","type":"challenge","from_addr":"poa19YthRDcMiAJUL7ZbPE3ZS1D3QdjQctLx8x8fcByEwaK5","to_addr":"","amount":"","epoch":18,"ts":1793266338,"memo":"","atts":9,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa19YthRDcMiAJUL7ZbPE3ZS1D3QdjQctLx8x8fcByEwaK5","nonce":8,"parents":["f5b7a17826dfd9fff04874385cac66235fe718b38892c295df002067556da408","7565362c3f4f031443bcaf8b1ed2e57c54adcaae688b90c1dab5a7fdbbcd20ab"],"ts":1793266338,"epoch":18,"seed":"c6e63bca1b244ca6","answer":"Because the velvet index is kept in the vertex history, a repeat is caught as a duplicate, and the prism audit republishes its digest each close. Answer text is checked for similarity against the entire 29 epoch history rather than the current epoch alone, so a template that worked once cannot be reused later either. Running 166 keys therefore needs a fresh supply of prose indefinitely, which turns a one-off build into a permanent operating cost with no amortisation. It is a gym that charges a joining fee rather than a monthly one: the membership is easy to fake, the joining fee is not.","stamp":4,"sig":"xN27LBgmT3pJJ1b3RTpBR6GuQFVkAEVLaF3xcmUiog15AUwWNwkjX3zxiz85YmnV5hyXy2MFR8TaTG7ZZqTqdye"},"checkpointed":{"height":160987,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T15:54:58.777Z","checkpoint_height":160987,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}