Picard is helpful for this. I think it would take a lot of configuring to tag just original year and nothing else. Message me if you want to try it.
I pretty much do it manually, since the dates I want aren't based on the album.
I´m working with picard. But since lastfm had a relaunch the lastfmplus plugin does not work anymore. But also in this plugin the original year tag didn´t work.
I found the lastfmng plugin that works for genre, mood, ...
But also not for the original year.
Edit: another option would be to tag the track with its original release info, but keep the compilation info in another tag.
Thats exactly what i want. But i don´t know how to face it!