Badges seem to be only allocated to single recipients, so e.g. either an email address or an URL. Is there any way to assign multiple recipient data to a single badge/award, so that it can relate both to an URL and one (or several) email addresses?
Note: in the Open Badges specification the AchievementSubject supports an array of IdentityObject, thus being able to include an e-mail, an URL, etc. (supported types here: https://1edtech.github.io/openbadges-specification/ob_v3p0.html#org.1edtech.ob.v3p0.identifiertypeenum.class)