How to Investigate the Copyright Statues of a Work: Guide for determining the copyright state of a work.
What is Public Domain?
It is a work that is not protected by copyright. This work can be reproduced, distributed, performed, displayed, or made into derivative works without the permission of the copyright holder.
Typically work in the public domain includes:
If a work does not meet these four conditions, then assume it is protected by copyright.
What is considered to be public domain work?