Global supply networks encompass many inter-connected suppliers. Many of these suppliers are unpredictable and beyond the direct realm of the company, making the management of sustainability a difficult task. This research attempts to put forth a profound exploration of the integration of sustainability across complex multi-tier supply networks through the utilization of blockchain technology. The research includes a selected literature review compromising well-cited research that focuses on multi-tier supply networks and blockchain technology. The findings suggest that blockchain can enhance suppliers’ visibility. Managers will have increased transparency and traceability of their global supply networks, which will eventually reduce information asymmetry and limit opportunistic behaviors. Furthermore, the connectivity and rapid/immutable sustainable information sharing features associated with blockchain increase suppliers’ predictability and create robust sustainable supply networks. Despite the potential benefits enabled by the technology, the research highlights some vital complexities that may obstruct the adoption of the technology across multi-tier supply networks.