In the United States, the US Copyright Office says that "registration is voluntary" and works are protected by copyright as soon as they are "created and fixed in a tangible form". However, this same page says that registration is necessary to bring a lawsuit for infringement of a US work and registration is a pre-requisite for receiving statutory damages and attorney's fees following litigation. The Copyright Claims Board also requires registration to start a claim. Both options - litigations in federal courts as well as claims at the Copyright Claims Board - require registration to proceed.
In cases where the infringer does not respond positively to valid requests from a work's creator, are there any options to enforce the protections afforded to the creator without registration? If so, what are these options? If not, what is the justification for the apparent contradiction if the only way(s) to enforce the creator's rights requires registration?
To clarify what I mean by "contradiction": If one looks across other rights that are widely held in the United States, such as the right to peaceably assemble or the right to a speedy and public trial, one does not have to take proactive steps. That is, when one believes their rights have been violated, they can turn to the courts and pay the associated fees, such as the ones outlined here or similar fees for local courts, and the cost of representation. However, the economic and moral rights protected by copyright law are somehow different in that one must pay twice - once (in relatively short order - 5 years after publication, registration is no longer prima facie evidence) proactively, and then again to initiate proceedings against those who have violated your rights. To the best of my knowledge, there are no other rights like this in the United States.