It may also have been put on other "platforms." I'm totally green when it comes to current "music distribution" stuff, since I usually engage music in older-fashioned ways.
But I'm aware that a lot of people do like to use these streaming apps, so there you have it.
It is a shame that, as far as I can see (?), Spotify doesn't allow for rich crediting of people involved, or other metadata like liner notes—which ends up divorcing the sound object from a lot of meaningful context. (But again I'm green and might be wrong about that?)