Trust is essential to society. Blockchain shifts some of the trust in people and institutions to trust in technology. The main objective of the EU-funded TreBlo project is to support and facilitate research on technology that will lead to more scalable blockchain-based solutions and applications. These will contribute to ensuring the exchange of trustworthy and reliable content on social networks and media. To achieve its aims, the project will implement a series of open calls, inviting academic and R&D research teams to define and implement small-scale research projects related to trust and reputation models on blockchains as well as proof-of-location and proof-of-validity authentication mechanisms.