This is not copyright infrigement. It is better known as ‘fair use’.
I found this content to assist explain the Copyright Law of the United States of America other nation states have their own laws and should be followed in respective jurisdictions.
Copyright law and Related Laws Contained in Title 17 of the United States Code
§ 108. Limitations on exclusive rights: Reproduction by libraries and archives39
(a) Except as otherwise provided in this title and notwithstanding the provisions of section 106, it is not an infringement of copyright for a library or archives, or any of its employees acting within the scope of their employment, to reproduce no more than one copy or phonorecord of a work, except as provided in subsections (b) and ©, or to distribute such copy or phonorecord, under the conditions specified by this section, if-
(1) the reproduction or distribution is made without any purpose of direct or indirect commercial advantage;
(2) the collections of the library or archives are (i) open to the public, or (ii) available not only to researchers affiliated with the library or archives or with the institution of which it is a part, but also to other persons doing research in a specialized field; and
(3) the reproduction or distribution of the work includes a notice of copyright that appears on the copy or phonorecord that is reproduced under the provisions of this section, or includes a legend stating that the work may be protected by copy-right if no such notice can be found on the copy or phonorecord that is reproduced under the provisions of this section."
Archive.org is non-profit, and makes note of your original copyright (as published on your site)
This is akin to you having published a magazine, and the Library of Congress keeping a copy.
Additional material from the site archive.org:
"About the Archive
The Internet Archive is a 501©(3) public nonprofit that was founded to build an ‘Internet library,’ with the purpose of offering permanent access for researchers, historians, and scholars to historical collections that exist in digital format…
…Why the Archive Is Building an ‘Internet Library’
Libraries exist to preserve society’s cultural artifacts and to provide access to them. If libraries are to continue to foster education and scholarship in this era of digital technology, it’s essential for them to extend those functions into the digital world…
The Internet Archive is working to prevent the Internet — a new medium with major historical significance — and other “born-digital” materials from disappearing into the past. Collaborating with institutions including the Library of Congress and the Smithsonian, we are working to permanently preserve a record of public material.
Open and free access to literature and other writings has long been considered essential to education and to the maintenance of an open society. Public and philanthropic enterprises have supported it through the ages.
The Internet Archive is opening its collections to researchers, historians, and scholars to ensure that they have free and permanent access to public materials. The Archive has no vested interest in the discoveries of the users of its collections, nor is it a grant-making organization.
"Are you violating copyright laws?
No. Like your local library’s collections, our collections consist of publicly available documents. Furthermore, our Web collection includes only pages that were available at no cost and without passwords or special privileges. And if they wish, the authors of Internet documents can remove their documents from the collection."
I declare ‘Fair use’