The specific recital is here: https://gdpr-info.eu/recitals/no-42/ https://gdpr-info.eu/recitals/no-42/ A screen capture is the easiest way to achieve complian

The specific recital is here: https://gdpr-info.eu/recitals/no-42/ https://gdpr-info.eu/recitals/no-42/ A screen capture is the easiest way to achieve compliance but the regulation leaves open other methods as long as you can show that someone gave consent and to what exactly. (IMO you could also store the HTML of the webpage they viewed at the time)