YouTube Music https://www.music.youtube.com is a streaming platform similar to Spotify, Apple Music or Deezer.
When you distribute music on YouTube Music, artist profiles are automatically generated in a "Topic Channel" where the Art Tracks are hosted, regardless of your artist channel on YouTube.com. The Topic Channels cannot be edited.
What is an Art Track?
An Art Track is a video with your song on YouTube Music with your artwork as a static image.
If you submit your release to YouTube Content ID, you must also submit it to YouTube Music.
More information here.