It's a for profit company. It has a dot com address. The real copyright office is a dot gov site.

Same thing happens with driver license and other things. You have to be careful what site you land on. Yes it will most likely get you a valid us copyright but it will cost you more in fees and profit margin than the dot gov site

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.