The length of copyright over a work varies between different countries. For example, in the US, the copyright lasts 95 years since the date of publication or 120 years since its creation (if work is not published).
Visit the link below to get the tenure of copyright in your country:
http://en.wikipedia.org/wiki/List_of_countries%27_copyright_lengths#Legend
A derivative work in copyright is a new creation that is based on or derived from an existing original work. It differs from the original work in that it includes elements of creativity or transformation that make it distinct from the original.
An infringement of the original authors' copyright.
Anyone who creates an original work is using copyright to protect it.
The original work remains in the public domain; copyright in the new work is not a renewal of the original protection: it is an entirely new copyright. For example, if I do a new translation of the Dead Sea Scrolls, I control copyright over my translation, but the original texts are still in the public domain. If I record a performance of a Bach chorale, I control copyright over that recording, but the original work is still in the public domain.
Because it's not your original work.
If you are using materials that are not your original work, you need permission from the copyright holder. Works that are entirely your own are automatically protected by copyright as soon as they are fixed in a tangible medium.
A derivative work is a new creation that is based on or derived from an existing work, such as a sequel, adaptation, or translation. In copyright law, the creator of a derivative work must obtain permission from the original copyright holder to use their work. This is to protect the original creator's rights and ensure they are properly credited and compensated for their work.
Yes, editing a photo can affect its copyright status. If the edits are substantial and original enough to create a new work, the edited photo may be considered a derivative work with its own copyright. However, if the edits are minor and do not significantly change the original photo, the copyright status may remain with the original creator.
In Canada software is protected as a literary work under the Copyright Act of Canada. Copyright is acquired automatically when an original work is generated, the creator is not required to register or mark the work with the copyright symbol in order to be protected.
I'm interpreting that the contributor means, "Is it possible to get a permanent copyright for a work?"No. Under U.S. copyright law, a copyright only lasts until 70 years after the original author's death. This is still a very long time to hold a copyright, and some people claim it is too long.
Unless other arrangements are made, the creator of the work is the automatic copyright holder.
The copyright symbol © is used to demonstrate that an original work is protected and permission must be sought before use by a third party.