How do I start a campaign with an unreleased song?
You can do it one day prior to release; the track link is available from Spotify by 1 p.m. CET in your Spotify app or desktop artist account. Make sure you use a track link URL like: https://open.spotify.com/track... not https://open.spotify.com/album.. because the album isn't working.
If you only have the album link, like in this example: spotify:album:7K8vpMVsCXDqMEzxxxxxxx
Paste it exactly like that in your browser and hit enter. You should be able to see the album and then copy the track link.
If you need help still, please let us know.