In your song details, you can find your song activity. Song activity tells users the history of activity in the song. This is very beneficial for shared songs as the activity will tell you exactly who did what to the song.
Song activity includes:
Recording added
Recording removed
To access the song activity, open a song project and click the Details icon in the header of the song project.
Click the the Activity tab to see all of the activity for that song project.
To learn about what you can do with your activity, click here.