OCLC Preservation Services

"With years of experience in digitization services, microfilm production and preservation project planning, we assist clients worldwide in creating solutions that expand access to collections while preserving the integrity of the original materials.
We stay on top of technological developments in the digitization and preservation of library and archive materials, and continually strive to find flexible and cost-effective reformatting options. We also provide metadata services and content management tools to increase visibility of your unique collections."

OCLC Preservation Services offer secure managed storage of digital content, as well as microfilm. Once an item is made into a digital archive, the OCLC systems perform quality checks and records the results in a "health record" for each file. Quality checks are done periodically by the OCLC automated system.

http://www.oclc.org/preservation/default.htm
http://www.oclc.org/digitalarchive/default.hmt