Provable Data Integrity: Implementing an Immutable Ledger for Cross-Border Settlement Networks
How RTGS Global partnered with Build Circle to integrate a tamper-proof database ledger across six cloud jurisdictions, guaranteeing provable transaction integrity, unlocking follow-on capital investment, and earning a feature spotlight at Microsoft Build.
“Working with Build Circle gave us the confidence that our data integrity was provable, secure, and future-ready. Their expertise with Azure SQL Ledger helped us achieve transparency at a scale that meets the trust our clients and regulators expect.”
Chief Technology Officer, RTGS
Global Azure jurisdictions deployed with cryptographic verification
Currencies covered with verifiable transaction history
Capital funding unlocked to accelerate technology investment
Keynote feature showcase spotlighting architectural leadership
The Challenge
Zero-tolerance for discrepancy in high-velocity international settlements
RTGS Global operates in a critical financial environment where cross-border transaction logs and real-time account balances must remain indisputable. In global interbank settlement networks, even a minor discrepancy can undermine trust, violate banking licenses, and trigger severe regulatory penalties:
- The demand for immutability: Historical records detailing who executed a transaction, when it occurred, and how balances changed had to be provably immutable and tamper-evident.
- Complex multi-jurisdiction footprint: Operations spanned multiple sovereign regions and currencies, meaning integrity safeguards had to function across distributed cloud environments without introducing settlement latency.
- Audit and verification overhead: Traditional logging mechanisms were vulnerable to internal tampering claims or audit challenges. The business needed a system that proves no transaction log or balance ledger has been altered undetected.
RTGS Global required an architecture capable of embedding cryptographic ledger integrity directly into core database engines, without sacrificing transactional speed or scalability.
The Solution
Deploying verifiable, tamper-evident ledger architecture at scale
Build Circle partnered with RTGS Global to design, build, and deploy an immutable transaction architecture, working directly with pre-release Azure SQL Ledger technology:
1. Multi-jurisdiction ledger integration
- Distributed cryptographic ledgers: Integrated immutable ledger capabilities across RTGS Global’s core database systems operating in six distinct Azure cloud jurisdictions.
- Multi-currency support: Engineered the solution to record, verify, and balance high frequency transactions across multiple currencies concurrently.
2. Cryptographic proof of data integrity
- Tamper-evident records: Implemented cryptographic hashing and verification digests that generate mathematically provable records for every transaction event and account balance change.
- Auditor-ready transparency: Created verification pathways that enable internal risk teams and external financial regulators to confirm data validity independently without inspecting raw underlying infrastructure.
3. Long term engineering partnership
- Sustainable delivery foundations: Build Circle remained integral to the ongoing engineering and development process, embedding rigorous testing and modern delivery practices to support future platform extensions.
Business Outcomes
Regulatory trust, external investment, and industry recognition
- Unlocked strategic growth capital: Achieving provable, enterprise scale data integrity provided investors with high confidence, unlocking additional funding rounds to accelerate platform expansion.
- Global Microsoft Build feature: The project was spotlighted as an industry flagship case study for the global launch of Microsoft’s SQL Ledger feature at MS Build, validating RTGS Global’s technological leadership.
- Uncompromising regulatory compliance: Fully satisfied stringent international financial audit requirements by providing indisputable evidence that transaction balances remain unaltered.
- Extended engineering partnership: Build Circle was retained to continue guiding the bank’s core development processes, ensuring architectural integrity scales alongside commercial adoption.
Looking to achieve provable data integrity or modernise critical financial systems?
Discover how Build Circle helps regulated fintech and enterprise leaders build tamper-proof architectures, satisfy strict compliance standards, and scale with confidence.
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