I created an add-on for my Scrobbble plugin. It’s nowhere near finished yet. https://github.com/janboddez/scrobbble-addon
For now, it adds genres (a custom taxonomy) for tracks with a known MusicBrainz track ID. And downloads cover art based on what it thinks is the album MBID.
To display these, I could … use a
the_content filter, or create a couple blocks.