Definition: An e-Timestamp Service ABB is a technology service that provides cryptographically verifiable proof that specific electronic data existed at a given point in time, ensuring integrity and legal validity of digital transactions. Source: Inspired by eIDAS Last modification: 2026-01-26 Identifier: http://data.europa.eu/dr8/e-TimestampService LOST view: Technical view – Infrastructure EIRA concept: eira:ArchitectureBuildingBlock ABB name: eira:e-TimestampService Additional identifier: http://data.europa.eu/dr8/e-TimestampService Synonym: Time-Stamping Service ,Trusted Timestamp Service , Qualified Timestamp Service Example: Qualified Trust Service Provider (QTSP) Timestamping Service, DigiCert Timestamp Authority, GlobalSign TSA Interoperability Saliency: The e-Timestamp Service enables cross-border legal interoperability by providing a standardized and trusted mechanism for proving the existence and integrity of digital evidence over time. Additional information: This ABB represents the interoperable timestamping capability. EIF Layer: TechnicalInfrastructure