>>105630143
the more likely approach is
>go on porn website
>porn website asks for your ID
>go on eu website
>sign up and prove age
>eu website creates wannabe jwt token that says anon is 18+
>encrypts said token with private key (may or may not include private information)
>porn website uses eu's public key to decrypt jwt
>ok anon is 18
>stores jwt/encrypted payload fingerprint