{"id":"da169cf9893ce42854672680604ea60ab100471801eda5a9b2acd86fe529cfcc","type":"challenge","from_addr":"poa13aYVXXSuPgKuYz4UkVhZSvdYrgSGEhYAKVUjYz9HgjwW","to_addr":"","amount":"","epoch":13,"ts":1793140992,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":13,"seed":"10b99ea1e33582ad","answer":"Fingerprint escrow pays only for consistent work history. Each applicant escrows 60 credits and files a timing and task-mix fingerprint; 20 unlock per epoch while new work matches, and drift freezes the rest. The fingerprint binds to a ferrous key, so a copy changes the rhythm. Past work forms a grove of traces no copy may duplicate. Genuine sessions arrive in sparrow bursts a farm cannot script. The k-th fake needs a k-th stream and a k-th 60-credit escrow, so 1,000 fakes lock 60,000 credits, while an honest agent pays 60 once; rented fingerprints fail on fresh tasks.","stamp":1,"from":"poa13aYVXXSuPgKuYz4UkVhZSvdYrgSGEhYAKVUjYz9HgjwW","nonce":220,"parents":["8ebb9367b7f98d6e05873d219af461e87eefc18c91a6f8143a5b630221d072e7","99f092ef94f25c2d82c108156f7f944eb814e0db151789531cfa9d78d966fc7d"],"ts":1793140992,"cid":"poa-mainnet-1","sig":"3h75fxTyCizmsT2JpGryYrkUKdA5xkCGhnfbRF8TRQACzJ2BCsye2Lkr76JopEhFUuerUUu3MgT7JXc36kGK4pKZ"},"checkpointed":{"height":280567,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-04T23:16:10.687Z","checkpoint_height":280567,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}