CD Baby is mainly a distributor (and manufacturer) for independent artists. Only in some rare cases CD Baby is a label. Do not use "CD Baby" as a label, unless there is a "cdb" prefix in the catalog number. In all other occasions, use whatever "label" information is provided via the artwork of the release. If there is no proper label, use Not On Label (Artistname Self-released).

You may, however, add CD Baby as a distributor in the "Label, Company, Catalog Number etc" section by assigning the "Distributed By" role. Your entry will then appear under "Companies etc" between the Tracklist and the Notes.