Yasanur KayikciNazlican Gozacan-ChaseAbderahman Rejeb2025-10-0620240964-47331099-083610.1002/bse.3489http://dx.doi.org/10.1002/bse.3489https://gcris.yasar.edu.tr/handle/123456789/7878The transition to a circular supply chain (CSC) is a prerequisite to establish sustainability in the supply chain. Blockchain-based CSC enables stakeholders to effectively manage their decision-making processes increase revenue reduce time and costs and ensure information synchronisation. Blockchain start-ups play an essential role in facilitating the transition from a linear to a circular economy while supporting the development of CSCs. This research aims to explore the role of blockchain entrepreneurship in the transition to CSC by evaluating circular blockchain start-ups. This research contributes to the literature by providing verified roles of blockchain entrepreneurship in the transition to CSC by evaluating the literature and blockchain start-ups. Another contribution is that the causal relationships between these roles are analysed. In this study an integrated three-step methodology including Systematic Literature Review (SLR) Qualitative Comparative Analysis (QCA) and Fuzzy Decision-Making Trial and Evaluation Laboratory (Fuzzy-DEMATEL) methods on the base of the theory of change is proposed. An SLR is performed to determine the roles of blockchain entrepreneurship. Then a QCA is conducted after identifying the roles for verification by evaluations of use cases of blockchain start-ups. Finally the causal relationships between these roles are interpreted by using Fuzzy-DEMATEL. Findings indicate that blockchain entrepreneurship has 12 fundamental roles in facilitating the transition from a linear to a circular economy while supporting the development of CSCs.Englishblockchain entrepreneurship, circular supply chain, Systematic Literature Review, Qualitative Comparative Analysis, Fuzzy-DEMATEL, theory of changeREVERSE LOGISTICS, SMART CONTRACTS, ECONOMY, MANAGEMENT, INDUSTRY, MODELS, WASTEArticle