Copyrighting a song is actually fairly easy. The U.S. Copyright Act of 1909 states that an original work is copyrighted as soon as it is in a fixed and tangible form. In other words, the second that you record that song (whether it be a professional studio, or a tape recorder), it is a protected copyright. Fixed and tangible doesn't have to be a recording either, it can be transcribed into notes on a page as well. Registration is not mandatory for copyright protection, however, it does provide some extra benefits to the copyright owner, if an infringement case arises.
Here's an article that explains it step by step:
http://www.knowthemusicbiz.com/index.php/BIZ-WIKI/Music-Publishing.html
2005.
1980.
1998.
It's very difficult to determine what shows were properly renewed; often it's on an episode-by-episode basis, and many renewal records are not easily located without ordering a search of paper records. You may find that it is safest to assume it is protected by copyright unless explicitly stated otherwise.
Because protection is automatic, the copyright date would be the year it was written. However, it's meaningless in the long term because protection is based on your life, not the date of the work.
1959.
1966.
You may in the first case have to check copyright of the score. If its subject to copyright then you have to ask permission of the copyright owner to use that score If the score is out of copyright and the following must apply (USA ONLY Other countries may vary) "Works published after 1922, but before 1978 are protected for 95 years from the date of publication. If the work was created, but not published, before 1978, the copyright lasts for the life of the author plus 70 years". Then you can publish the song with the words accredited to who ever wrote them and the score to who ever wrote it. BUT! , you must make sure of the copyright first
1943; however, the Copyright Office record shows that copyright protection was terminated in 2004.
2001.
The Queen song is from 1977; there are several other works by that title.
Published in 1873, the song itself is in the public domain, but certain performances, arrangements, and recordings may have additional protection.