Can we get the social security number (11 digits) for right holders and other relevant roles?

No, Brønnøysund does not allow sharing social security numbers to us or our clients. Normally, only public organisations and credit .. receives this kind of information. Datatilsynet is highly sceptical of using social security numbers freely. 

RRH considers name, date of birth and address as adequate identification. This data is delivered through the service.