This book gathers the refereed proceedings of the 1st International Congress on Blockchain and Applications 2019, BLOCKCHAIN’19, held in Ávila, Spain, in June 2019. Among the scientific community, blockchain and artificial intelligence are broadly considered to offer a promising combination that could transform the production and manufacturing industry, media, finance, insurance, e-government, etc. Nevertheless, there is no generally accepted approach, nor established best practices, for combining blockchain and artificial intelligence. 

The 21 papers presented here were carefully reviewed and selected from over 40 submissions. They highlight the latest advances in blockchain, artificial intelligence and their application domains, exploring innovative ideas, guidelines, theories, models, technologies, and tools, and identifying critical issues and challenges that researchers and practitioners will face in the near future. We wish to thank the sponsors: IEEE Systems Man and Cybernetics Society, Spain Section Chapter, and the IEEE Spain Section (Technical Co-Sponsor), IBM, Indra, Viewnext, Global Exchange, AEPIA, APPIA and AIR institute. 

Table of Contents

1. Lightning Network: A Comparative Review of Transaction Fees and Data Analysis
2. Do Smart Contract Languages Need to Be Turing Complete?
3. Towards Integration of Blockchain and loT: A Bibliometric Analysis of State-of-the-Art
4. ClinicAppChain: A Low-Cost Blockchain Hyperledger Solution for Healthcare
5. Smart Contracts are More than Objects: Pro-activeness on the Blockchain
6. Blockchain Based Informed Consent with Reputation Support
7. Privacy Centric Collaborative Machine Learning Model Training via Blockchain
8. Fuzzy Rules Based Solution for System Administration Security Management via a Blockchain
9. A Balanced Routing Algorithm for Blockchain Offline Channels Using Flocking
10. Anticipatory Policy as a Design Challenge: Experiments with Stakeholders Engagement in Blockchain and Distributed Ledger Technologies (BDLTs)
11. The Electronic Bill of Lading
12. A Methodology for a Probabilistic Security Analysis of Sharding-Based Blockchain Protocols
13. The "Tokenization" of the eParticipation in Public Governance: An Opportunity to Hack Democracy
14. Blockchain Approach to Solve Collective Decision Making Problems for Swarm Robotics
15. Prediction of Transaction Confirmation Time in Ethereum Blockchain Using Machine Learning
16. Improving Event Monitoring in loT Network Using an Integrated Blockchain-Distributed Pattern Recognition Scheme
17. On Value Preservation with Distributed Ledger Technologies, Intelligent Agents, and Digital Preservation
18. Blockchain Technology: A Review of the Current Challenges of Cryptocurrency A Blockchain- and Al-based Platform for Global Employability 
19. Blockchain and Biometrics: A First Look into Opportunities and Challenges