It is not. We currently give ~infinite copyright automatically for nothing in return:
> Neither the deposit requirements of this subsection nor the acquisition provisions of subsection (e) are conditions of copyright protection.
https://www.copyright.gov/title17/92chap4.html#407
Copyright protection is automatic.
Publishing of copyrighted material requires that it be deposited with the Library of Congress.
Copyright protection is automatic.
Publishing of copyrighted material requires that it be deposited with the Library of Congress.