It's not easy to get the exact original release date of an album or a track. Even Musicbrainz does not offer that information for every album/track, not to mention other music databases.
I think Google has been doing a great job helping people to find this information at least for widely popular songs. So you could create custom web links on the track information panel and then quickly find out the information for either selected or playing album/track just by one click.
First, use this for album release date:
https://www.google.com/search?q=<Album Artist> <Album> release date
Then Google will show you something like this:
Now this is for an individual track included in compilations:
https://www.google.com/search?q=<Artist> <Title> release date
Then it will show something like this: