Traditional Origami
Traditional Origami describes origami models whose origin is unclear or unknown, these origami models where either created too long ago to for anyone to have claimed them or they have been created by many different origami designers, being deemed as Traditional.
All traditional origami models are considered ‘Public domain’, meaning anyone can create tutorials for them or teach them in classes and sell the final origami models or their diagrams.
Modifications of traditional origami models are very easy to discover, which means claiming modifications as a copyrighted design is hardly ever seen, as many people can come up with the same design. It’s better to call them modifications and not original creations.