ADAGP administers rights for Brancusi.
Unless the job is work for hire or work for employer the photographer holds the copyright.
Medieval Times most likely holds the copyright, unless their agreement with the designer specified otherwise; as a corporate work, it would be protected for 95 years after its creation.
I don't know about all of it, but Fragments From Franceand Bullets & Billets by Bruce Bairnsfather has no copyright in the United States right now. It is available as a download from Project Gutenberg (www.gutenberg.org)
minimalist sculptures and paintings
The copyright for Alec Stern's work is most likely held by Alec Stern himself, unless he has transferred it to someone else through a formal agreement. The copyright automatically belongs to the creator of the work unless it is specifically assigned or licensed to someone else.
Do I need to submit a different copyright application for each work that I do.
No; copyright would belong to the rightsholder of the underlying work.
If you are not the creator of the work, you cannot claim copyright on it.
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.
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.
A work of sufficient creativity is automatically protected by copyright as soon as it is fixed in a tangible medium.
Certain things on the Internet are copyright. This is because it is someone work/ creation and is therefore illegal to use this persons work with out acknowledgement of the creator. Anything which says copyright ( such as artists songs) are copyright.