Recently the modern urban society faced a lot of challenges in terms of sustainability and sustainable resource management, especially after crises that are accompanied by uncertainties like the COVID-19 pandemic. The authors investigate how new sustainable urban resource techniques, such as blockchain technologies (BCT), can moderate the relationship between uncertainty-anxiety about the global epidemic, GSC, and urban SCs' robustness in order to better understand how the pandemic can be used to improve these areas of supply chain management. The PLS-SEM approach was used to test and evaluate hypotheses based on responses from a questionnaire filled out by 446 Egyptian SMEs' managers. The results demonstrate that GSC practices are greatly enhanced by the uncertainty-anxiety posed by the epidemic. Furthermore, BCT moderates the association between pandemic uncertainty-anxiety and GSC. GSC also reinforces SCs' robustness in urban society markets. Additionally, GSC considerably influences the connection between uncertainty-anxiety about the outbreak and the robustness of urban SCs. The results of this research have far-reaching consequences for the administration of SMEs during COVID-19. To achieve the robustness of urban SCs, they demonstrate the critical need of using GSC, and BCT consistently to offer information that is both transparent and fits the demands of their stakeholders. Also, this study contributes to the theory by using the supply chain resilience, Dynamic capabilities, and crisis management theories to show how the uncertainty-anxiety of the pandemic positively affects the GSC practices and urban supply chains, and how the dynamic capabilities theory explains the innovative BCT moderating effect of such relationship.