well you need to fill out an application that has the title, completion year, first publication, etc, then you have to pay the fee and finally upload or mail in a copy of your work. this is the source i used, hope this helps!
https://www.copyright.gov/eco/help-registration-steps.html
<span>The Gothic cathedral was one of the most awe-inspiring achievements of medieval technology. Architects and engineers built churches from skeletal stone ribs composed of pointed arches, ribbed vaults, and flying buttresses to create soaring vertical interiors, colorful windows, and an environment celebrating the mystery and sacred nature of light. Based on empirical technology, the medieval cathedral provided the Middle Ages with an impressive house of worship, a community center, a symbol of religious and civic pride, and a constant reminder of the power and presence of God and the church.</span>
I think the answer is true