The following information is regarding TuneCore's Publishing Administration service
According to copyright law, the composer owns the copyright to a composition as soon as it is fixed in a tangible medium (written down or recorded). Registering your copyright with the Library of Congress makes this ownership part of the public record, and allows you to sue for monetary damages in the event of a legal dispute regarding the ownership of your songs. You may complete the registration process online at: www.copyright.gov/eco/
The PA form (Work of the Performing Arts) is the form used to register a composition (words and music).
The SR form (Sound Recording) is the form used to register the master or audio recording only.