May 28, 2022

U.S. Copyright Office Releases Upgrades to Virtual Card Catalog Proof of Concept

Note: The Virtual Card Catalog proof of concept was introduced on January 24, 2018.

From the U.S. Copyright Office:

Today, the U.S. Copyright Office implemented a series of technical upgrades to enhance searching and results tracking capabilities when using the proof of concept of the Virtual Card Catalog (VCC).

In this upgraded version, users now:

  • have the option to perform simple and advanced queries based off the raw datasets captured from the images;
  • may execute queries to narrow the number of results from browsing (in addition to browsing drawers);
  • have more images from which to search (for a more complete search)—this new release contains approximately 99.6 percent of the images from the two indexes;
  • can select multiple drawers from multiple indexes to browse and can click on a card to enlarge an image along with the set of images for easy scrolling; and
  • may also select specific drawers for additional queries, in addition to saving up to twenty-five cards to a folder during a browsing session.

These improvements are designed to enrich the user experience and improve the efficiency of searching Copyright Office records. To access the VCC, click:

Feedback and survey links are contained within the site. Your feedback is welcomed and appreciated.


* Note: This proof of concept is not a final version of the planned Virtual Card Catalog. The purpose is to validate the VCC’s feasibility and to verify its potential use for the public. The images are presented in a similar filing order as found in the physical card catalog and may contain filing errors and corrupt images.

See Also: A New Proof-of-Concept: Library of Congress Introduces a Virtual U.S. Copyright Office Card Catalog (January 24, 2018)

About Gary Price

Gary Price ( is a librarian, writer, consultant, and frequent conference speaker based in the Washington D.C. metro area. Before launching INFOdocket, Price and Shirl Kennedy were the founders and senior editors at ResourceShelf and DocuTicker for 10 years. From 2006-2009 he was Director of Online Information Services at, and is currently a contributing editor at Search Engine Land.