This report forms part of the overall body of work conducted by the Social Sciences and Humanities Open Cloud (SSHOC) Task 8.2 Trust & Quality Assurance, Impact team. One of the objectives of this task was to examine the trust landscape of organisations participating in the SSHOC project and from the wider Social Sciences and Humanities (SSH) domain. As part of SSHOC Task 8.2, desk research was conducted in the autumn of 2021. The aim of this research was to explore the SSHOC trust landscape and examine the applicability of CoreTrustSeal Trusted Digital Repository (TDR) certification for repositories belonging to one of the four SSHOC member ERICs (European Research Infrastructure Consortiums). Areas that were examined within the desk research include repository type and stability, certification status, repository and research data discovery and identification, and the provision of repository information made available to users and other stakeholders. The results of this research indicate that TDR certification plays an important role in enhancing repository practice, particularly in relation to the provision of repository information to users and stakeholders. TDR certification appears to be closely related to ERIC membership within the SSHOC community, which in turn impacts on several areas relating to repository best practice. Differences that were noted between certified and non-certified repositories in our sample include the use of persistent identifiers, repository registry use and approach to digital preservation. The results also highlight significant variation in the terminology used by SSHOC repositories to refer to repository services and/or service components. Areas of terminological variation that were noted during the desk research include (but are not limited to) designated communities (and their related entities and/or stakeholders), disciplinary specialism and sub-specialism and the type(s) of data stored by repositories. Such terminological differences within the SSH domain creates challenges for TDR certification and the possible certification of wider data service providers. Further work is needed to examine the various characteristics of data repositories and data service providers within the SSH community and the wider European preservation landscape. Additional areas of focus that such work could address include possible certification solutions for SSH repositories and data service providers as well as the applicabil...