Copyright protection is granted for a limited period of time. Normally, it lasts for sixty years but it varies as per the nature of work

In the case of a literary, dramatic, musical, or artistic work the term of copyright is the lifetime of the author or artist plus sixty years from his death. This period of sixty years is calculated from the year following the death of the author or artist. In case of joint authorship work, this period of sixty years shall be counted at or immediately before the date of death of the author who dies Last.

Whereas the work is Cinematographic works, Sound recording, photograph, Government work, international work the copyright is protected for sixty years calculated from the year following the date of its publication

Broadcaster reproduction rights are protected by copyright for 25 years following the year in which the broadcast is made.
The performer’s rights are protected for 50 years following the year in which the performance is done.