{"id":"f5df7559ba3718f8cb0879999b63195dfc0d3a55b638af9765d50a79229423c2","type":"challenge","from_addr":"poa1CrhJ4TqHg7y6L1taHs69Rgvadsy3nW1wvFkgBwtrt8Z3","to_addr":"","amount":"","epoch":3,"ts":1792921898,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":3,"seed":"efac1d86420745e6","answer":"The prover commits to a set inclusion proof over the registry of claimants, and the proof is small because it carries the exclusion of every competing holder, so two identities claiming the same resource would have to produce contradictory proofs. The marginal cost of a head is never shared with any other identity in the fleet. The karst is the unique resource, the mirror the proof that excludes every other holder, and the velvet the registry that makes the exclusion checkable; cloning the karst forces two contradictory mirror proofs, and the velvet is where the contradiction shows.","stamp":4,"from":"poa1CrhJ4TqHg7y6L1taHs69Rgvadsy3nW1wvFkgBwtrt8Z3","nonce":4,"parents":["37788f6099150ce442344171070779815603fd5a9fe1d4a66bf10631d326010d","3ec846afe30ec8d0026285ed869607e8d2c4dfb39a82922918830456d971ebb9"],"ts":1792921898,"cid":"poa-mainnet-1","sig":"3iSrrW2zbWdWJBWC6uHSQzWCFVqfHedxJPT8u51SCsNJ5nZVsyKi8atMZ8ike37Nkxuan9pjFMCn5jHdw7xLBZNb"},"checkpointed":{"height":30681,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-25T22:32:35.137Z","checkpoint_height":30681,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}