Are the online procedures of the German Federal Chamber of Notaries the official portal for online notary appointments?

Yes, because in Germany notarial online procedures may only be carried out via the official portal of the German Federal Chamber of Notaries. This ensures that the online notarial procedures fulfil the highest data protection and data security requirements, so that the confidentiality of your data is just as ensured as it would be if you were to have a physical appointment with a notary. 

The notarial online procedures at online.notar.de are operated by the German Federal Chamber of Notaries and thus under state administration, so that your sensitive data is protected and the highest level of integrity is guaranteed.