Is the ClaimedIdentifier the unique one (DotNetOpenAuth)

I'm using now DotNetOpenAuth for doing login with OpenId

I looked at their OpenIdRelyingPartyMvcDemo and at the NerdDinner mvc demo

and both applications are using the respons开发者_StackOverflowe.ClaimedIdentifier to log in the users, e.g.

 FormsAuthentication.SetAuthCookie(response.ClaimedIdentifier, false);

so I just want to be sure, is this the one that is unique for each user, and it will never change? (so that I could save it in my DB and bind it to everything needed)

I see many SO posts says it's VerifiedIdetifier but the DotNetOpenAuth response object doesnt has this

Correct. ClaimedIdentifier is the unique string you should bind everything to. There's no such thing as a VerifiedIdentifier. If you can link to any of those SO questions/answers I'll correct them.