The adoption of Internet of Things (IoT) devices in numerous industries is rising rapidly these days, particularly in health care industry. The volume of data transmitted by these devices is enormous, and it will be in variety of formats. Furthermore, there is no guarantee that the data and gadgets are secure. If the equipment malfunctions as a result of one of the attacks, it may endanger human life if there is a direct connection. Therefore, it is required to have extensive investigation if any IoT-related cybercrime is discovered. This entails gathering adequate evidence from these IoT devices in order to undertake a thorough inquiry and obtained evidentiary data has to be protected. The primary purpose of this work is to extract evidences from Raspberry Pi and record it in the public digital ledger. This work also focuses on gathering data from wide range of IoT devices, that are in different data formats. After precisely examining the relationships between evidence, provenance, traceability, and auditability, artefacts from IoT devices are extracted and published in the IoT Forensics Network ledger.