All of this is spelled out in the U. S. online government publication, http://www.copyright.gov
Copyright U. S.

As has been posted several times before , as noted by Malcolm Douglas. Beware of 'advice' found in these threads. The comments by MMario and Artful Codger re arrangements are correct, but look it up for yourself.

A similar online booklet for UK regulations is also available, as mentioned and linked in previous threads, or look it up yourself.

So-called 'International copyright' has been mentioned as well, which means usually that the copyright holder has taken care to register in the UK as well as the U. S.; however, the EU also also has moved into the field, but this is still in a state of flux.
See, among others: http://ec.europa.eu/internal_market/copyright/index_en.htm
Copyright and related rights

Take anything you see in Wackipedia with a ton of salt; there are 'articles' on copyright in there that contain questionable material.

Finally no regulations cover all possible situations; that is why there are lawyers specializing in litigation on copyright.