Inspiration
The idea for VerdictVR emerged from the need to make legal systems more transparent, accessible, and understandable. Traditional courtrooms are often complex, slow, and intimidating for the average person, while legal processes lack visibility for the public. At the same time, advancements in virtual reality, blockchain, and AI opened up an opportunity to rethink how judicial systems could function in a digital-first world. This inspired us to build a decentralized, immersive courtroom where legal proceedings can be simulated, observed, and even automated with AI-driven roles, making justice more transparent and interactive.
What it does
VerdictVR is a decentralized, AI-powered virtual courtroom that runs entirely in the browser. It allows users to create or join trials in an immersive VR environment where participants can take on roles such as judge, plaintiff, defendant, or observer through avatars. The platform enables users to submit evidence, interact through a trial log, and experience courtroom proceedings in real time. AI-powered agents can simulate roles like judges or lawyers, providing legal reasoning and verdicts based on input data. All trial data, including evidence and interactions, is stored on-chain using Internet Computer Protocol (ICP), ensuring transparency, immutability, and trust.
How we built it
We built VerdictVR using a fully browser-native architecture to keep it lightweight and accessible. The frontend was developed using React integrated with Three.js and WebXR to create an interactive 3D courtroom experience that runs directly in the browser without requiring external engines like Unity. The backend leverages ICP canisters written in Motoko to handle trials, user roles, evidence storage, and verdict logic in a decentralized manner. AI functionality was implemented using modular prompt templates that can connect to LLM APIs such as OpenAI or LLaMA, enabling intelligent role simulation. The entire system is structured into clear modules, including frontend, backend, AI agents, and 3D assets, ensuring scalability and maintainability.
Challenges we ran into
One of the biggest challenges was integrating multiple advanced technologies—VR, blockchain, and AI—into a single cohesive system. Ensuring smooth performance in a browser-based VR environment while rendering 3D scenes was technically demanding. Designing decentralized data structures for trials and evidence on ICP required careful planning to maintain both efficiency and transparency. Another challenge was creating meaningful AI interactions, as generating accurate and context-aware legal reasoning required well-structured prompts and reliable LLM integration. Additionally, synchronizing real-time user interactions with on-chain storage introduced complexity in maintaining responsiveness.
Accomplishments that we're proud of
We successfully built a fully browser-based VR courtroom that requires no external engines, which significantly lowers the barrier to entry. The integration of blockchain for storing trial data ensures a high level of transparency and trust, which is a core requirement in legal systems. We are particularly proud of combining immersive VR experiences with decentralized backend logic and AI-driven interactions into a single working prototype. The modular architecture also makes the platform extensible for future enhancements, positioning it as more than just a hackathon project.
What we learned
Through building VerdictVR, we gained hands-on experience in integrating cutting-edge technologies into a unified system. We learned how to design decentralized applications using ICP and Motoko, as well as how to optimize 3D rendering for web-based VR environments. The project also deepened our understanding of prompt engineering and AI integration for domain-specific tasks like legal reasoning. Beyond technical skills, we learned the importance of system architecture, scalability, and designing user experiences for complex, multi-role platforms.
What’s next for VerdictVR
The next step for VerdictVR is to evolve from a prototype into a fully functional decentralized legal simulation platform. We plan to integrate real LLM APIs to enhance the accuracy and reliability of AI judges and lawyers, enabling more realistic legal reasoning. Expanding multiplayer capabilities with real-time voice communication and synchronized VR interactions is another priority. We also aim to deploy the platform on the ICP mainnet for true decentralization and integrate identity verification for more authentic role assignment. In the long term, VerdictVR can be extended into applications such as legal education, mock trials, dispute resolution systems, and even experimental decentralized justice frameworks.
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