ProductionJavaSpring BootJDBCRESTBouncy CastleAmazon S3
ChronoPreuve
Prove when it existed. Prove who signed it.
Timestamping, electronic signatures, and electronic archives for durable digital evidence.
- Started
- 2023
- Development
- Ongoing


Durable evidence for digital documents
ChronoPreuve combines trusted timestamps, electronic signatures, and long-term electronic archives. It helps establish when a document existed, who approved it, and whether it has remained intact.

What it helps you do
Timestamp documents
Associate digital material with verifiable proof of existence at a specific point in time.
Apply electronic signatures
Connect documents to signer identity and protect their integrity with cryptographic evidence.
Archive for the long term
Preserve documents and their evidence beyond the lifetime of a short-term working system.
Store evidence securely
Use established cryptographic components and S3-compatible storage in a service-oriented architecture.
Designed for
Documents that must remain provable
- Evidence-sensitive business processes
- Signed document workflows
- Long-term electronic records
- Applications requiring timestamp services
Learn more