Yeah, it makes me wonder whether his complaint is really with his label, but he can't sue his label without creating friction. So he sues Spotify, Spotify performs discovery which shows his own label is withholding these royalties, he turns around and sues his label (or more likely, settles with them).

Better still - what if Spotify turns out to be right, and he didn't provide the required information to Spotify to allow them to pay him his royalties, so his complaint is really with himself?