This book constitutes the revised selected papers of the 9th International Symposium on Distributed Ledger Technology, SDLT 2025, held in Melbourne, VIC, Australia, during November 20–21, 2025. The 15 full papers included in this volume were carefully reviewed and selected from 37 submissions. They explore current systems and propose innovative solutions, providing a robust scientific foundation for the advancement of Distributed Ledger Technology applications.
