Electronic Signatures and Infrastructures (ESI) - Time-stamping protocol and time-stamp token profiles (ETSI EN 319422 V1.1.1 (2016-03)) (english version)
Edition 2016-05-01

Security requirements for trustworthy systems managing certificates and time-stamps (Endorsed by AENOR in May of 2015.)
Edition 2015-05-01

Electronic Signatures and Infrastructures (ESI) - Policy and Security Requirements for Trust Service Providers issuing Time-Stamps (V1.2.0)

Electronic Signatures and Infrastructures (ESI); Policy and Security Requirements for Trust Service Providers issuing Time-Stamps (ETSI EN 319421 V1.2.1 (2023-05))
Edition 2023-07-01

Electronic Signatures and Trust Infrastructures (ESI); Policy and Security Requirements for Trust Service Providers issuing Time-Stamps (IEC 2025-01) (Draft ETSI EN 319421 V1.3.0 (2025-01)) Ident (english version)
Edition 2025-02-15

Protection profile for trustworthy systems supporting time stamping (Endorsed by Asociación Española de Normalización in October of 2019.)
Edition 2019-10-01

Information technology. Security techniques. Time-stamping services. Traceability of time sources
Edition 2015-04-30

Electronic Signatures and Infrastructures (ESI) - Time-stamping protocol and time-stamp profiles (Endorsement of the English version EN 319 422 V1.1.1 (2016-03) as German standard)
Edition 2016-08

Protection profile for trustworthy systems supporting time stamping; English version EN 419231:2019
Edition 2019-11

Electronic Signatures and Infrastructures (ESI) - Time-stamping protocol and time-stamp token profiles (V1.1.1)
Edition 2016-07-15