Testing and debugging of coverage files for routing apps is only supported during development through the Xcode Run workflow. (You can specify the coverage file for a given Run scheme using the Options pane of the Run section of the scheme editor.) Apps that are archived and distributed (outside of the App Store) onto devices will not have access to the app's coverage files.
So far, the major labels have been unwilling to let their music be distributed on podcasts, which don't have any kind of digital-rights management scheme that prevents users from redistributing the files.