Song Copyrights:
When people create copyright works, often the first question is "who owns it?" This is an important question because ownership of the copyright in a work grants the owner several exclusive rights. What you, or anyone else, can do with a copyrighted work depends on who controls the rights in a particular work.
Ownership of the copyrights in a work provide the owner with the exclusive right to control how the work may be used and as such, copyright ownership is recognized as a very valuable item in today’s web-connected age where copyrighted works are the main commodity of trade.
The owner of a copyright in a work has certain exclusive rights that give the owner the ability to control how the work is used by others. The rights to make copies and distribute copies to others are two of the exclusive rights. If you intend to publish your work, you'll need to be able to give those rights to the publisher, which means you need to have secured the rights in advance.
Rights are very valuable and will be created whether or not you want them. Once established, they can be transferred to others through agreements such as licenses and assignments.
Copyrights are very important because they recognise who actually owns the song, music or lyrics and who gets to make money from it. When songwriters write songs, the songs are automatically copyrighted as soon as they are in a tangible form (like a recording, or fixed as printed sheet music). I however to back up your claim of copyright ownership the song should be registered. Registration should always be done before the song is published or released into the public domain
Authors for copyright purposes are only those individuals who create the copyrightable expression. When many people contribute to a work, special issues arise. The work may be a joint work, in which case all joint authors would jointly own the work. The work may be a compilation or derivative work where existing works are combined in new ways or modified to form a new work, in which case ownership may need to be clarified through licenses or agreements.