Trust Development for Blockchain Interoperability Using Self-sovereign Identity Integration

Despite advances in developing various blockchain platforms and services, disparate blockchain networks do not support direct communications, causing fragmentation and data and asset in silos. Blockchain interoperability is a solution that allows communication between different blockchain platforms to exchange data and assets. This study investigates a blockchain interoperability solution based on publish-subscribe architecture to share data between various blockchain platforms. We extend the solution by providing decentralized identifiers and verifiable credentials to the users sharing and accessing data through inte-gration with Hyperledger Indy, Aries, and Ursa stack projects, which are blockchain services offering decentralized identity. We also designed a testbed comprising multiple permissioned blockchain platforms integrated with decentralized identity ser-vices to evaluate the proposed system's security and integrity