“Under Pressure” is in the key of D major — two half steps up from C. If you’re working in a DAW, you can click and drag the notes of the C major scale outlined above up two half steps and voila! D major! However, we’ll spell them out for you here as well:
Let’s back up. Music publishing is one form of ownership of music. It denotes the act of composing a song. If the song is released, it generates publishing royalties. If you, the creator of this release, composed the song, then you own the publishing rights and can collect royalties from this ownership.