You can use copyrighted material at any time if you have obtained permission first. In order to use copyrighted materials without permission you need to establish the project as "fair use"
The four primary factors you need to consider are...
The copyright holder, or anyone the copyright holder authorizes.
Use the latest copyright date.
You may use copyright protected material when you are the copyright holder, or when you have permission from the rightsholder or an exemption in the law. The most notable exemption is fair use or fair dealing, which allows certain limited unlicensed uses in situations such as education and commentary.
With permission from the copyright holder, yes.
Copyright gives the creator of a work control over its use. A license is a way the copyright owner can allow others to use the work.
license agreement
Websites are protected by copyright, so you would need permission from the copyright holder or an exemption in the law to use someone else's web content.
Contact the copyright owner, or his/her agent.
If your use would not be considered fair, ask the copyright holder for permission, in writing, and be specific.
I have not received a notice of copyright infringement related to the use of spectrum.
Yes, you can use the copyright symbol () even if your work is not registered. The symbol indicates that the work is protected by copyright law, whether it is registered or not.
You need permission from the copyright holder or an exemption in the law.