In most jurisdictions, your "name" is whatever you answer to.
Pen names are a time-honored tradition: Mark Twain, Lewis Carroll, Dr. Suess, George Orwell, George Elliot to name some of the more well known. In musical circles, they are referred to as stage names: Gerry Samuels, George Harrison, Paul McCartney, and Prince have all used them and Axi Rose, ...
Spotify adds the songwriter names, so no. Spotify adding a songwriter name does not bound the artist to the contract you agree to when you sign up.
The terms of service apply to users signing up.
Now that you have changed the link to the link for artists, yes using a pen name is misrepresenting yourself in a way. However I would think ...
It's of course safest to obtain licenses for any copyrighted work you use, but I see a strong argument supporting a fair-use defense here.
The factors for fair use are set out in 17 USC 107:
The purpose and character of the use, including whether it is of a commercial nature or for nonprofit educational purposes: Your use is educational, which cuts in ...
It is best to just ask the owner of the copyright if you can use the material.
Using short snippets of the song for commentary is most likely ok, but the artist can still go to court if he/she feels too much of the song is used.
The court would look at whether your use of the songs infringes on the artist's ability to be compensated.
This site says it ...