Redistributing copyright works means making a work further available by copying and distribution, including uploading. It is one of the exclusive rights of the copyright holder.
A work that is not subject to copyright protection would be in the public domain. Examples are works of the federal government (such as NASA imagery) or works for which protection has expired.
Copyright protects creative works, and royalties are paid to the copyright holder for use of the works.
A minor owns the copyright on any works they create.
Copyright law.
According to copyright laws in most countries, "musical works" are specifically listed among protected works. The intent of copyright is to encourage creativity, and music is certainly creative.
Your original works, on your Wordpress blog, are automatically protected by copyright. Using others' copyright-protected works on your Wordpress blog requires an exemption in the law or permission from the copyright holder.
Orphan works are works in which there IS a valid copyright but they holder of the copyright has not come forward or is not know. They are NOT available for reproduction.
Millions of text documents and other works are copyright 2009.
Works are protected by copyright as soon as they are "fixed." If you wish to register a work with the copyright office, you may do so.
That depends on what you mean by "old". With a few exceptions, works published prior to 1923 are in the public domain and can be used freely without permission. Works after that date would have to be researched to determine their copyright status.
Works no longer protected by copyright are said to be in the public domain.
Copyright law applies virtually equally to both "hard copy" and digital works.