They are hashes of hashes, and in fact I already did scan all* the blocks to check if any of them meet the constraints, just in case (they don't, and it would b

They are hashes of hashes, and in fact I already did scan all* the blocks to check if any of them meet the constraints, just in case (they don't, and it would be extremely unlikely but not entirely out of the question). *as of a year or so ago (my archive is stale and I'm too lazy to update it)