It depends on what you consider an ''unreleased song''.
If your song is published on Spotify and can be listened to by anyone but you haven’t officially shared it with the public, then you can promote it with us.
If your song isn’t published yet or not visible to anyone on Spotify, it won't be possible to promote it with us as you won't be able to obtain the song's public Spotify URL. You’ll need to wait until you have the public Spotify URL so that everyone can listen to the song.
For more information about the song's Spotify URL, please click here.