I wrote a C++ program that finds a song in my MP3 files with an artist or title that starts with a lowercase letter.
Most often, it’s an invalid value in the MB database.
That’s how I found these two edits:
https://musicbrainz.org/edit/119037250
https://musicbrainz.org/edit/119036249
I won’t write such a script myself, but maybe someone will use this idea.
That might often enough be the case but are you aware of artist intent?
Especially for Japanese artists you should be careful, in the case of native it’s intentionally lowercase
New knowledge. Thanks.
I’ll give it a rest with these four 
Romantic Collection\12 Aria & Mistique\CD1\07. colon - fifth element.mp3
Romantic Collection\12 Aria & Mistique\CD1\10. void - Stardust Ocean.mp3
Summer Chillout, Lounge & Ambient Beats\151. phon - Nervous Tension.mp3
Saint-Germain-des-Pres Cafe Paris\CD01\11. quasimode - Oneself-LIKENESS.mp3