All Use Cases
Document Timestamping
Prove that a document existed at a specific point in time with blockchain-grade timestamp verification backed by SHA-256 hashing and cryptographic proof.
The Challenge
- File metadata timestamps can be easily manipulated
- IP disputes require proof of prior existence
- Traditional notarization is slow and expensive
The Solution
- SHA-256 hash provides unique document fingerprint
- Immutable timestamp backed by cryptographic transaction ID
- Third-party verification without sharing document content
Common Applications
Intellectual Property
Designs, code, inventions - prior art documentation.
Legal Documents
Contracts, agreements, and legal notices.
Research Data
Research findings and experimental results.
Creative Works
Manuscripts, artwork, compositions, and designs.
Regulatory Filings
Submissions to regulatory bodies.
Software Releases
Version snapshots and release artifacts.
API Example
Timestamp a document and attach it as evidence.
Timestamp a document
curl -X POST https://api.tryengrave.com/api/v1/events \
-H "X-API-Key: ek_live_abc123..." \
-H "Content-Type: application/json" \
-d '{
"event_type": "document_timestamped",
"event_timestamp": "2026-01-18T09:00:00Z",
"metadata": {
"document_title": "Patent Application Draft v3",
"document_type": "intellectual_property",
"author": "R&D Team",
"internal_reference": "IP-2026-0089"
}
}'
# Then attach the document as evidence
curl -X POST https://api.tryengrave.com/api/v1/events/{event_id}/evidence \
-H "X-API-Key: ek_live_abc123..." \
-F "file=@patent_draft_v3.pdf"