Even if so, there's a decent fair-use argument. The cases are mixed, but there have been some lawsuits over book summaries that came out in favor of the defendant, even though in a sense a summary of a book "derives" from the book. No idea what a court would hold, but fingerprints seem like they'd be on even stronger footing, since to the extent they're a summary, it isn't even much of a human-interpretable one, intended instead for indexing purposes, so it replaces the original work even less than a book summary does.