Many teams around the world are working on the problem of providing digital certificates proving vaccination.
-
EU Digital COVID Certificate specifications
- lots and lots of documentation
- https://ec.europa.eu/health/ehealth/covid-19_en
-
EU certificate reference implementation
-
Switzerland
- Docs, APIs, and source code of checking apps and backend
- https://github.com/admin-ch/CovidCertificate-Documents