This book constitutes the proceedings of the 8th International Conference on Blockchain & ICBC 2025, held as part of the Services Conference Federation, SCF 2025, held in Hong Kong, during September 27&30, 2025. The 14 full papers and 2 short papers included in this book were carefully reviewed and selected from 29 submissions. ICBC 2025 provides an international forum for both researchers and industry practitioners to exchange the latest fundamental advances in the state-of-the-art technologies and best practices of blockchain, as well as emerging standards and research topics.