Green Communications is an innovative company created in 2010 with a unique expertise in wireless networks and distributed systems. The company is strongly engaged in answering the challenge of Internet mobility, saturation and energy footprint.  Therefore, we created Green PI, a low carbon impact Internet and edge cloud platform providing fast and resilient services for IoT, mobility and critical applications. Green PI is the result of 20 years of research and development and a technology transfer from top French universities (Sorbonne University and Paris Saclay) and the CNRS. Green Communications leads the task T2.5 on data integrity and trustworthy data sharing using a blockchain approach. The company is involved in HosmartAI system specifications, development, integration, and pilot deployment (WP1-3-4-5) and participates to project results dissemination and exploitation strategy definition (WP6-7).