In inter-organizational business processes, divergent interests among participants often result in trust deficiencies. The question of how to initiate trust remains a largely unresolved theoretical issue. However, the advancement of Blockchain technology has led to an increase in its application for establishing trust among stakeholders in these processes. This paper introduces a conceptual model that leverages an ontology of trust to examine its significance within digital ecosystems and suggests a method to promote the integration of blockchain. We validate our approach with a practical industrial case study and outline prospective developments in the field of trust facilitation through blockchain technology.