Verify DGC through third-party service

[chauhan-rohit]

Hello @MykhailoNester ,

I am from an airline IT team and we are creating an application to use DGC for retrieving Vaccination information. This information is needed to determine whether traveler is allowed to fly to particular destination based on destination country covid rules. We are able to decode the DGC QR code using the standard libraries but struggling with Verification process. We referred the below official docs, but couldn't figure out how a third party can verify a DGC. Our use case is to accept DGC for all countries.
https://ec.europa.eu/health/sites/default/files/ehealth/docs/digital-green-certificates_v4_en.pdf
https://ec.europa.eu/health/sites/default/files/ehealth/docs/digital-green-certificates_v5_en.pdf

[daniel-eder]

In order to verify a DGC you need access to the public keys. To that end you need at least one country, usually the country you are operating from, to give access to their list. You can find a discussion on this topic, with public lists and further information here: eu-digital-green-certificates/dgc-participating-countries#10