Library of Congress guidance on personal digital archiving
NESTOR (Network of Expertise in the Long Term Storage of Digital Resouces)
Catalogue of Criteria for Trusted Digital Repositories (Version 1 - 2007)
Nestor-Handbuch: Eine kleine Enzyklopädie der digitalen Langzeitarchivierung (Version 2.3 - 2010)
Trustworthy Repositories Audit and Certification: Criteria and Checklist (TRAC) which was developed by OCLC's Research Libraries Group and the US National Archives and Records Administration and published in 2007.
ISO 16363:2012 Space Data and Information Transfer Systems Audit and certification of trustworthy digital repositories
Data Seal of Approval (DSA).