Would a handwritten "Copyright 2021 (My First and Last name)" copyright notice, be valid and have it's standard legal aplication in USA as well as in EU, for me - an author form Slovenia (EU), if I write it in handwritting on a handwritten 30-page original literary work of nonfiction, which I would publish only on social media, in the form of a collection of 30 pictures of scans of handwritting?
The work would not be catalogued, registered or published anywhere else so I assume that if it would be censored by the platforms - deleted, I would not have a link to an active published refference to the work, and don't know how could I persue my case in court, should it come to that, however my research so far has given me the impression that such a copyright notice is the best international protection and deterence symbol agianst infringement on the rights, and even to use in a court of law.
(My current project just has to be in handwritting...)
Grateful for any help.