Simple past tense and past participle of copyright.(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "copyrighted" in a sentence
"The network programmers submitted that this would mean the cable company would then be making unauthorised use of copyrighted programmes, because people could (gasp!) fast forward ads placed in copyrighted programmes that they run."
"Notably, as a crucial element to foster the healthy development of e-commerce in copyrighted materials, these treaties obligated adhering countries to enact effective legal regimes to protect technological measures used by copyright owners to control access to and copying of their works."
"However, because this work may contain copyrighted images or other material, permission from the copyright holder may be necessary if you wish to reproduce this material separately."