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This book constitutes the refereed proceedings of the Second International Conference on Blockchain, ICBC 2019, held as part of the Services Conference Federation, SCF 2019, in San Diego, CA, USA, in June 2019.

The 13 full papers and 2 short papers presented were carefully reviewed and selected from 29 submissions. The papers cover a wide range of topics in blockchain technologies, platforms, solutions and business models such as new blockchain architecture, platform constructions, blockchain development and blockchain services technologies, as well as standards, and blockchain services innovation lifecycle including enterprise modeling, business consulting, solution creation, services orchestration, services optimization, services management, services marketing, business process integration and management.

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Blockchain: an empirical investigation of its scope for improvement.- Establishing Standards for Consensus on Blockchains.- An Experimental Evaluation of BFT Protocols for Blockchains.- Layered Consensus Mechanism in Consortium Blockchain for Enterprise Services.- Digital-Physical Parity for Food Fraud Detection.- Blockchain Interoperable Digital Objects.- Patient Privacy and Ownership of Electronic Health Records on a Blockchain.- Blockchain Federation for Complex Distributed Applications.- Enriching Smart Contracts with Temporal Aspects.- CloudAgora: Democratizing the Cloud.- Dual Token Blockchain Economy Framework, The Garment Use case.- Performance Benchmarking and Optimization for Blockchain: A Survey.- Developing a Vehicle Networking Platform based on Blockchain Technology.- Decentralized Identity Authentication with Trust Distributed in Blockchain Backbone.- Performance Evaluation of Hyperledger Fabric with Malicious Behavior.

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