No, you were right at the beginning. There is no "root" or "real" pubkey. A separate keypair is generated each site, so that - like you said - identities are un

No, you were right at the beginning. There is no "root" or "real" pubkey. A separate keypair is generated each site, so that - like you said - identities are unlinkable. This is also a crucial part of what makes these credentials immune to phishing.