I don't know if its gonna be good but adding "osu ver." on the title of the song you yourself personally edited or tracks that are shortened solely for the game would work to clearly distinguish that this cut version was made exclusively for this game. Kinda similar to how TV sizes work, they were shortened for the sake of their respective animes themselves, so I think putting "osu ver." would work also. It also helps to further promote the game.
I've edited a certain track (not the uploaded one) and trying to name it "short ver." seems really questionable since 1.) it could be mistaken as the official short version 2.) i have a subjective preference recently with adding "osu ver." after the title instead of "edit ver" or "cut ver."
I've edited a certain track (not the uploaded one) and trying to name it "short ver." seems really questionable since 1.) it could be mistaken as the official short version 2.) i have a subjective preference recently with adding "osu ver." after the title instead of "edit ver" or "cut ver."