The demonstrator illustrates to citizens how their personal data is used. Through simple overviews, users regain the transparency and control that are the cornerstones of data sovereignty. Our proposed solution includes a data marketplace with a digital twin that helps citizens share their data. This directly engages individuals while adhering to ethical principles, including providing monetary or non-monetary consideration for data sharing. With DIH's "Build and orchestrate" solution, sovereign data spaces for sharing data can be created and managed with just a few clicks.