Similarly, you may ask, is copyright and publisher the same thing?
An author can either retain their copyright, or assign it to a publishing company. If they assign the copyright, then the publishing company now is the owner of the copyright. The copyright owner can publish the book at a much later date. Publication isn't required for a work to be eligible for copyright protection.
One may also ask, what is the role of a music publisher? The role of a music publisher involves: Promoting composers and songwriters and their music to performers, broadcasters, record companies and others who use music on a commercial basis, both nationally and internationally.
Also know, does a music publisher own the copyright?
A music publishing company can offer multiple services for songwriters. As a 'publishing administrator', they administer the copyright – protecting the use of songs as well as collecting royalties owed from use.
Should I copyright my book before sending it to a publisher?
There is no need to copyright your book (with the U.S. Copyright Office) before submitting it. The publisher merely handles the paperwork on behalf of the author, and the copyright is the author's property.