In this conference paper, we address the lack of standardization in certification processes through the development of a web platform. In the growing field of digital learning opportunities, as Massive Open Online Courses (MOOCs) are, the knowledge and skills validation and certification still lack the required coherence and transparency that would allow learners to earn comparable and stackable certificates. The paper was presented at the 14th International Conference on Education Technology and Computers (ICETC 2022), by Sofia Terzi, Katerina Zourou and Iosif Terzis. The paper expands work carried out in the framework of the BlockAdemiC project.