status: Recognised & Endorsed

Chair (s): Lisa de Leeuw, Jonathan Crabtree

Group Email: [group_email]

Secretariat Liaison: [field_secretariat_liaison]

The current version of the CoreTrustSeal Requirements can be found at: 

The CoreTrustSeal Maintenance Group is the successor to and maintains the outputs of the Repository Audit and Certification DSA–WDS Partnership WG. The original Working Group was created at the request of RDA members who sought a single set of ‘core’ level Trustworthy Digital Repository (TDR) Requirements and an associated assessment and certification process delivered through a sustainable service provider. 

The working group resulted in the 16 CoreTrustSeal Requirements in 2016, and these have been revised and maintained over time  in coordination and cooperation with the RDA. The CoreTrustSeal Standards and Certification Board ( is a not-for-profit foundation (Stichting) status under Dutch law. 

The CoreTrustSeal Maintenance Group seeks and encourages the widest possible input into the process of maintaining and revising the requirements, which takes place every three years. The goal of the CoreTrustSeal is to maintain alignment with current practices while offering a low-barrier-to-entry ‘core’ level of certification that is broadly applicable to repositories that offer active preservation and meet the agreed criteria with their organisation infrastructure, digital object management, technology and security practices. 

The original working group case statement noted that “To ensure the quality and usability of shared data, the long-term preservation of these data in sustainable digital repositories is a sine qua non. Data that are created and used by science and scholarship need to be managed, curated, and archived so that the substantial investments in preparing and presenting the content and tools will not be lost. Certification is fundamental in guaranteeing the trustworthiness of digital repositories, and thus in sustaining the opportunities for long-term data sharing and corresponding services.”


Members of the original working group included two organisations that had  evolved and operated independently. The Data Seal of Approval (DSA) had a primary focus on digital repositories in the Humanities and Social Sciences while the ICSU-WDS World Data System repositories emerged from the Earth and Space Sciences. Both initiatives had a multidisciplinary mission. 

The resultant CoreTrustSeal criteria now undertake a key role in the membership process for WDS Regular Members, while the DSA merged into the newly formed CoreTrustSeal Foundation.




CESSDA webinar on Trust Landscape on Nov 10, 2022 at 15-16 CET

by Mari Kleemola

CESSDA ERIC is organizing a webinar on Trust Landscape on November 10 at 15-16 CET. The webinar is free and open to all. Program
0 | Add new comment

Invitation to participate in 'A Decade of Data: 10 Years of the RDA' events and activities

by Connie Clare

Good day, The RDA Secretariat would like to invite the CoreTrustSeal Maintenance WG to participate in ‘A Decade of Data’: Celebrating 10 Years of the Research Data Alliance’. 10 months to celebrate 10 years of the RDA
0 | Add new comment

Call for Papers: Research Data Alliance Results Special Collection

by Alexandra Delipalta

View the Data Science Journal special collection Continuous submission open at
0 | Add new comment

Community Review of Certification WG Deliverables

by Rorie Edmunds

Dear Colleagues, We would like to remind all members of the Certification Working Group that the following two deliverables are currently under RDA Community Review: The Common Requirements that are expected to replace the current certification catalogues of the Data Seal of Approval and the ICSU World Data System. A set of Common Procedures outlining the joint certification process that will be set up in the initial stages of the partnership between the two organizations.  
2 | Add new comment

Request for Comments: DSA–WDS Common Certification Requirements and Procedures

by Rorie Edmunds

Dear Colleagues, The following page has been added to the Certication IG webpage on behalf of the DSA–WDS Partnership WG Co-chairs in preparation for RDA P6: Please add any comments/suggestions you have to the two documents contained therein. Many thanks, Rorie Edmunds
3 | Add new comment

RDA P6 Meeting WG Repository Audit and Certification DSA–WDS Partnership

by Timea Biro

Dear Rorie, all, Thank you for applying to hold a meeting at RDA Plenary 6, your meeting has been scheduled for *24 September 2015 - BREAKOUT 6 - 15:30 -17:00.* You are invited to update the meeting page with a session description, objectives & agenda by 14 August at the very latest. Please bear in mind the "Getting the most from your meeting" courtesy of the RDA Technical Advisory Board when preparing the meeting:
0 | Add new comment

Last chance to get a P6 breakout

by Herman Stehouwer

The deadline for RDA Plenary 6 breakout session (23-25 Sept 2015) application is fast approaching. You have until 20th June 2015 to submit your request for a meeting space in Paris - Working & Interest groups as well as representatives from BoFs will be invited to share their group updates and interact with RDA members on 23
1 | Add new comment