YouTube Music Policy от Vitaly Bogdanov

The extension reads ID tags of the specified MP3 files, gets information about artist and title and uses it to search the track via YouTube music policies page. If several tracks were found it shows the most probable result. It displays artist and title of the found track to give user ability compare them manually. It also displays restrictions which are applied by YouTube on sharing this content. You can filter track restrictions by country you are targeting your content.

Usage: Install the add-on and navigate to YouTube Audio Library page. Then click on "Audio Library Classic" link at the top right corner. Extention adds new controls to the page to select multiple files, check them and show results.