Who owns the Copyright in a Work?
The copyright in a work immediately becomes the property of the author of the work. The only person who can claim the copyright is the author of the work unless the author lets others claim it in a written agreement. If a company asks one of its workers to do any type of work then the company owns all the copyright protection.
When multiple people create a work together then each of them owns the copyright. They are called "joint authors" and the work is called "joint work". The joint authors are co-owners of the copyright unless all of them agree on something else. For example if two students paint a painting then both of them are co-owners of the copyright of that painting but they can also agree that only one of them owns the copyright. For that both of the students have to agree.