This post sums up copyright and intellectual property as a whole, in the following posts I will take a more in depth look at different points.
The intellectual copyright law prevents other people and companies from using your work without your permission - that being said, artists do sometimes offer a creative commons licence which allows people to use their work if not for commercial reasons (they do not gain profit from using this work). It is used to protect an actual result, not an idea; if you had an idea for an artwork or a book (just two examples of creations) and someone else created the piece, there is nothing you can do about it; you have no grounds to stand on in a court of law.
For artistic creations, copyright is an automatic right - there is no charge nor need to apply for any kind of paperwork to have intellectual property protection. This falls under "design" category of property protection - there are two others, patents and trademarks (which I will discuss later).
Other areas protected by copyright laws are:
The names of any products or brands you own
Any inventions you create
Design or aesthetic of any of your products
Anything you write, create, or produce
It covers both 2D and 3D artistic creations
For artworks, copyright laws only protect work for 70 years after death - this usually results in a sudden surge of artworks being produced in clothing, pottery, etc. around 70 years after a popular artists' death (i.e. John Tenniel's illustrations being sold on cups in Whittards).
You own the rights to buy, sell, and licence any intellectual property that you have, however if you take a case to court and the judge finds the defendant's work funny, they will receive no charge under the law of parody.
Source(s) of information:
ipo.gov.uk/types/copy/c-about.htm
Notes taken from lecture delivered by Amy Dover.