We are adopting blockchain-based security features for the usage in web service applications \& platforms. These technology concepts allow us to enhance the level of trustworthiness for any kind of public web service platform. Related platforms are using simple user registration and validation procedures, which provide huge potential for illegal activities. In contrast, more secure live video identity checks are binding massive resources for the individual, staff-intensive validation tasks. Our approach combines traditional web-based service platform features with blockchain-based security enhancements. The concepts are used on two layers, for the user identification procedures as well as the entire process history on the web service platform.