365 Chain of Custody (CoC) and Chain of Preservation (CoP): authenticity in the platforms of management and preservation of records Charlley Luz 1 Daniel Flores 2 Abstract: This article discusses the relationship between authenticity and digital repositories. It highlights trust requirements in digital repositories and compares authenticity and authentication as different factors in a chain of custody. The aim is also to examine the role of the chain of custody in trusted and permanent digital preservation and the roles of a recordkeeping system in a custody of digital records on recordkeeping system and preservation platforms. It also seeks to define the importance of training and development of the information professional and the archivist for dealing with trusted digital repositories. Keywords: Trusted Digital Repositories. Authenticity. Digital Archival Document. 1 Introduction To the archival area, the concept of digital repository with archival requirements appeared a short time ago as a solution for the permanent archive. However, even with different international models, like the record continuum, the preservation solution always takes place in an environment after the one of management, and this path should be travelled with security. Such concept is so recent that the Dicionário Brasileiro de Terminologia Arquivística - DIBRATE (ARQUIVO NACIO- NAL, 2005), for instance, does not have an entry for “repositórios digitais” [digital repositories] or 1 Professor of the postgraduate course of Archival Management and Management of the Digital Information at FESPSP. Graduated in Archival Science (UFRGS), expert of Management of Information Services and Systems (FESPSP) and Master of Information Sciences, the Postgraduate Program in Information Science, School of Communications and Arts, University of São Paulo (PPGCI-ECA-USP). E-mail: charlley@feedconsultoria.com.br. 2 Professor at the Archival Science Course of the UFSM and at the Professional Master’s Degree in Cultural Heritage/ UFSM; Attending Member of the CTDE - CONARQ’s Technical Chamber of E-Documents. E-mail: danielflores@ufsm.br.