This book constitutes the proceedings of the 7th International Symposium, SDLT 2023, held in Brisbane, QLD, Australia, during November 30 - December 1, 2023. The 8 full papers and the short paper included in this volume were carefully reviewed and selected from 32 submissions. The volume focuses on current systems and new solutions to create a scientific background for a solid development of innovative Distributed Ledger Technology application.