I recently acquired a double EP from a fledgling artist that is on a single CD with one UPC. It has different album artwork and titles for each EP on the two sides of the CD sleeve, and it notes which tracks belong to which EP on the CD label itself. I assume it should still be entered as one release in one release group, but is there a specific way to denote this divide using MetaBrainz metadata or is this just something I would note in an annotation and title the release something like “Title 1/Title 2”? If this were a double-sided disc I’d at least have the side A/side B distinction, but this is a standard CD.
Also, since it might be relevant, this band doesn’t seem to have any kind of streaming/digital download presence, so I can’t look to different releases for guidance. It’s only just recently been released, so I may also simply wait to see if they make available alternative releases which give clearer guidance on the metadata.