In the US, copyright starts when the work is created and ends 70 years after the creator dies.
Works created anonymously or for hire, copyright lasts 95 years after first publication or 120 years after its creation.
https://www.copyri.../faq-duration.html HOWEVER... This varies by country. For instance:
In the US, Kermit the Frog is copyrighted by Disney and is no longer seen on Sesame Street in the US.
In Russia, Kermit the Frog is
public domain and is still on Sesame Street (Улица Сезам in Russian)because in Russia, the copyright of Kermit ended when Jim Henson died in 1997.