This Recommendation introduces a decentralized IoT service platform, blockchain of things (BoT), which is enabled by blockchain-related technologies. This Recommendation analyses the concept, common characteristics and high-level requirements of BoT, and provides common capabilities and functionalities, general procedures, and relevant use cases for BoT. BoT, works in a decentralized service mode and is capable of enhancing many aspects of IoT. It has the advantages of blockchain-related technologies, especially for building decentralized data storage and management, crowding decision-making and automatic interactions.