The publisher or composer (creator, author, etc) of such works. In the US, documents, music, and the like does not become public domain until 70 years after the death of the originator.
The copyright holder and his or her agent, representative, or licensee.
how should you show that a piece nof work is copyrighted
The copyright holder (owner of copyrighted material) has a right to reproduce the work, make changes and publish updated versions of the copyrighted work, distribute it and publicly display the work. Copyright is part of the Intellectual Property rights. In some industries like 3d printing, there are some serious issues with IP rights: mylocal3dprinting.com/blog/common-intellectual-property-issues-with-3d-printing/
Only if the copyright is not part of the copyright registration that is copyrighted in the publication of the author's registration. But If the copyright is part of the copyright registration that is copyrighted in the publication then the copyrighted author of which publicized the copyrighted registration is not copyrighted in the legalized sense of which a publication is copyrighted. Yes, a work is always copyrighted, before and after editing and both versions.
Anything new that someone writes can be copyrighted. Technically a work is automatically copyrighted once it is created unless the author explicitly abandons copyright in the work.
No
Your can publish or create anything you want as long as it isn't copyrighted or plagiarized.
If you create a new original work, copyright gives you the exclusive right to copy, alter, distribute, or perform/display it, or authorize others to do so, for a limited time. If you use someone else's copyrighted work without permission, you are violating federal law and will probably face significant fees.
No; the act of changing it would be infringing on the creators exclusive right to alter the work and create derivatives.
No, not without permission. One of the rights that copyright conveys is right to display the work publicly. By placing the copyrighted work in your portfolio, everytime you show it you are usurping the original artists right.
It is okay to write a book on something that is copyrighted, but you cannot publish your work unless you get permission from the author.
Permits the use of copyrighted work.