1. Zero-Knowledge Proof Generation

One of the most technically challenging aspects was implementing the zero-knowledge proof layer for capture verification. The goal was to prove that a valid capture event occurred without revealing sensitive information such as device identifiers or private metadata.

Designing efficient circuits and ensuring proof generation remained computationally practical was difficult. Early implementations resulted in proofs that were too slow for real-world usage. This required redesigning parts of the proof structure and optimizing the verification pipeline so that proofs could be generated and verified within acceptable performance limits.

Balancing privacy guarantees with performance constraints was a major engineering challenge.

2. Fileverse Integration

Another key hurdle was integrating Fileverse as the decentralized document layer for capture records.

Fileverse provides encrypted collaborative documents stored in a decentralized manner. The challenge was designing a system where capture records could be securely written, updated, and shared while maintaining strong privacy guarantees.

This required designing a clean workflow for:

• Writing capture metadata into Fileverse documents

• Maintaining encrypted document states

• Ensuring compatibility with Fileverse APIs

Structuring capture records in a format suitable for both humans and automated verification systems

Once implemented, Fileverse allowed Stamped to provide tamper-resistant and encrypted capture documentation that can be shared without relying on centralized platforms.

3. BitGo Wallet Infrastructure

Integrating BitGo introduced another set of challenges related to privacy-preserving wallet infrastructure.

The system uses BitGo wallets to:

• Manage cryptographic identities

• Generate fresh addresses

• Sign transactions programmatically

• Enforce wallet-level policies

Designing a workflow that maintained privacy while still allowing programmable verification required careful handling of wallet keys and transaction flows.

Ensuring that capture verification records could interact with BitGo wallets without leaking identity information required careful architecture design and testing.

4. System Architecture

The biggest overall challenge was designing an architecture that integrates:

• device trust verification - device attestation (play integrity)

• zero-knowledge proofs

• decentralized document storage

• wallet infrastructure

• capture verification

while still keeping the system usable in real-world workflows.

Multiple iterations were required before arriving at a design that balanced security, usability, and privacy.