Creator, or proof reader ?

Your example of musical engraving is a bit flawed (though your point in general is still true): there’s been jurisprudence saying that merely engraving does not _necessarily_ create copyright (it still may, if there’s sufficient creativity(! not sweat-of-brow!) going into it, but I only add a “© (where applicable)” to avoid fraudulous claims where no copyright exists to my digital editions of Free Sheet Music).

So, in this specific example, the bar is a bit higher, but yeah, the point stands.