I noticed recently that some of the digital media versions of albums have extra information available that is not included on the vinyl or cd versions. For example the digital stream version of Simon and Garfunkel’s Greatest Hits
includes extra information about the date and location of the 4 live tracks.
You’ll see this at Spotify, Apple Music, hdtracks.com and Amazon
To my knowledge, this information is not available on any of the other releases of this album. I haven’t checked how widespread this is. It’s probably label dependent. It this case, it’s legacy recordings part of Sony