The State of Oregon has an electronic vaccine card. There are options to save it to an iPhone or Android.
Oregonians can now download a unique QR code that proves their vaccine status. The optional digital vaccine verification tool, created by Oregon Health Authority (OHA), aims to eliminate the need for vaccinated Oregonians to provide a physical copy or photo of their vaccine card to prove their vaccination status and streamline the verification process for entertainment venues and restaurants that have a vaccination requirement in place.
Here’s a link to the website.