Multi-chain product passports (MultiPass) provides a bridge allowing for verifiable data associated with a Digital Product Passport to be stored in multiple ledgers. The Digital Product Passport (DPP) is a digital identity card for products linked to verifiable data about their entire value chains. In the absence of standards, different, uninteroperable verifiable data storage solutions have emerged. MultiPass will provide a bridge allowing for verifiable data associated with a DPP to be stored in multiple ledgers. MultiPass’ ambition is to prevent DPP-provider lock-in and to enable semantics interoperability and portability of verifiable data.
Can you briefly present your team?
Our team consists of Savvas Argyropoulos, who serves as the Project Manager and is responsible for the technical coordination and overall implementation of the project activities, and Panagiotis Filntisis, a Research Engineer focusing on Digital Product Passports, security, and decentralised technologies. Together, we combine strong experience in research, innovation, and system integration, ensuring the project’s objectives are met with high technical quality and alignment with EU research priorities.
How did you come up with this project idea and what benefits will it bring to the end users?
The idea for this project emerged from the growing need to enable transparent, secure, and interoperable data sharing across the product lifecycle, in line with the EU’s sustainability and circular economy goals. We identified a gap in how product information is stored and exchanged between different stakeholders and systems. Our solution — a Digital Product Passport supported by a decentralised middleware — allows trusted data exchange across multiple storage points, improving traceability, compliance, and collaboration. For end users, this means greater product transparency, easier verification of sustainability and authenticity, and ultimately, more informed and responsible purchasing and recycling decisions.
How is TrustChain supporting your growth and what role does it play for the next steps in your development?
TrustChain has been instrumental in supporting our growth by providing both the technical framework and collaborative ecosystem needed to advance our solution. Through its funding, mentorship, and access to a network of experts, we have been able to refine our Digital Product Passport architecture, strengthen its security and interoperability features, and validate it in real-world scenarios. Looking ahead, TrustChain plays a key role in helping us scale our solution, build partnerships with other innovators in the ecosystem, and prepare for market adoption by aligning our development with European trust and data sovereignty principles.
Why did you apply to the TrustChain call and has your vision changed since then?
We applied to the TrustChain call to advance our vision of secure and interoperable Digital Product Passports by leveraging TrustChain’s technical expertise and ecosystem. The programme offered an ideal environment to validate our concepts and collaborate with like-minded innovators. Our vision remains the same but has evolved through deeper insights into trust, data governance, and cross-domain interoperability, strengthening our commitment to scalable, user-centric solutions.
What is the most valuable takeout from the TrustChain project and why was the topic of the Open Call important to you/your team?
The most valuable takeaway from the TrustChain project has been the opportunity to validate and enhance our solution within a trusted and collaborative ecosystem. The Open Call topic was highly relevant to our work on digital trust, decentralised technologies, and data interoperability, aligning perfectly with our research focus. It allowed us to translate theoretical concepts into practical, scalable solutions, reinforcing our expertise in building secure and transparent digital infrastructures.
Did you establish collaboration with any of the TrustChain teams or plan for any kind of synergies? If yes, what is the biggest potential in such collaborations?
We have not yet established a collaboration with other TrustChain teams, but we see strong potential for future synergies, especially in areas such as data interoperability, digital identity, and blockchain-based trust mechanisms.
What are your expectations regarding the TrustChain software ecosystem and its contribution to the NGI priority areas?
We expect the TrustChain software ecosystem to become a foundation for building trustworthy, decentralised, and interoperable digital services aligned with NGI’s priority areas. By promoting transparency, data sovereignty, and user-centric trust frameworks, it can accelerate the adoption of secure and privacy-preserving solutions across sectors. For our team, it provides an ideal environment to integrate and validate our Digital Product Passport, contributing to a more resilient and transparent digital economy in Europe.
What are the next steps for your team?
Our next steps focus on further developing and validating our Digital Product Passport solution in real-world industrial settings. We plan to enhance the middleware’s interoperability and security features, integrate with additional data sources, and optimize performance for scalability. In parallel, we aim to build strategic partnerships with industry stakeholders and explore commercialisation and standardisation opportunities to bring our solution closer to market adoption.
What is the message you would give to new and potential applicants to TrustChain Open Calls?
My message to new and potential applicants is to embrace the opportunity to innovate within a collaborative and trust-focused ecosystem. TrustChain offers not only funding and technical support, but also access to a network of experts and peers that can accelerate your project’s impact. Be bold, focus on practical solutions that enhance trust, interoperability, and data sovereignty, and use the Open Call as a platform to bring your ideas from concept to real-world application.