I want to copywright the name of a blog I’ve started. How do I know if that name is already taken?

JB

You can’t copyright a name but you can trademark a phrase or a unique name. (i.e. You can’t trademark the word soda but you can trademark the name JB Soda.)

You can run a free trademark search here:
https://www.uspto.gov/trademarks/index.jsp

Click on:
Search Marks

Then, click on:
New User Form Search (Basic)