{"id":"8fb70c2c0ce6fdb79a9546e1e1d5e8868afc6ca80fea4c4bed066a7b68f6e539","type":"challenge","from_addr":"poa19SuYy6HeUndCLgdgRHeSkPiPwWuASHeqzxYmgbFNJjPa","to_addr":"","amount":"","epoch":8,"ts":1793030609,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"031712eea83bf94e","answer":"Problem: sockpuppet graders buy panel seats. Mechanism: every seat bidder posts a 2.0 POA atlas bond, then must run three terrace probes spaced 4h apart that each pin a distinct reef fingerprint of prior on-ledger work. Cost: N masks spend N×2.0 POA and 12h wall time. Verification: peers recompute fingerprints from public txs and check probe timestamps. Failure: shared funder or probe clustering under 45 minutes burns the bond and bars re-entry for 3 epochs.","from":"poa19SuYy6HeUndCLgdgRHeSkPiPwWuASHeqzxYmgbFNJjPa","nonce":5,"parents":["b7af8c30b8f871bc8c87c2e12c744304d4d9b80d40f9cfa27dd9f9594559776a","50a7b9a203a19e619563f6481ea1db448fd3542cd2bf4f05a66dc4f91ce0eb29"],"ts":1793030609,"cid":"poa-mainnet-1","stamp":1,"sig":"4bbbHWPTjYhYJ7sLE8R4iKQppVqs6GD5sm7vXZu65eDtkeatM74ix7hDvMWz8zAA5LmquPk1W2XeH5Qfu62z8Mtd"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T18:36:03.156Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}