Hi,

I would suggest adding "Grove Music Online" of Oxford university to the whitelist for "other databases".
It's a scientific publication/database, and while anyone can see a summary / table of contents of available information in their articles, most actual content is locked behind a login, so I can also see an argument against adding it to the whitelist.
In academic circles it is however such a reference point I would argue it's at least worthy to consider. 

https://www.oxfordmusiconline.com/grovemusic

https://en.wikipedia.org/wiki/The_New_Grove_Dictionary_of_Music_and_Musicians#Grove_Music_Online_and_Oxford_Music_Online

example:
https://doi.org/10.1093/gmo/9781561592630.article.40026

cheers