TestLedger™  CryptoSeal™ Verification
Non-DOT Workplace Drug Testing
CryptoSeal™
Verification Engine
CryptoSeal™  •  Verification Portal

Cryptographic proof
your record is
unaltered.

Upload a sealed TestLedger record to independently verify its cryptographic integrity. No server call. No authentication required.

SHA-256 Hash Verification
Record payload is rehashed client-side and compared against the sealed value. Any alteration is detected.
PHI Protected by Design
Donor identity is HMAC-protected. This portal verifies integrity only; it never renders protected health information.
FRE 901 Authentication Framework
Verification output is structured to satisfy Federal Rules of Evidence authentication requirements for electronic records.
CryptoSeal™ Verification Engine
Upload Sealed Record
Drag & drop or click to select the exported
TestLedger JSON record file
SHA-256: Awaiting upload...
SHA-256 HMAC-SHA-256 AES-256-GCM RFC 8785
Hash Comparison Only
Client-Side Only
No Auth Required
This portal recomputes the SHA-256 hash over the canonical record payload and compares it against the value sealed at record creation. A match confirms the record has not been altered since sealing.

Verifying record integrity...

CryptoSeal™

INTEGRITY VERIFIED

How This Portal Works

This portal rebuilds the cryptographic hash (SHA-256) from the record data you uploaded and compares it against the hash that was sealed at the time of record creation. A match confirms the uploaded record is byte-for-byte identical to the record sealed at the CryptoSeal™ event. A mismatch indicates the record may have been modified after sealing. This portal performs cryptographic hash comparison only. TestLedger LLC makes no determination regarding the accuracy, completeness, legal sufficiency, or regulatory compliance of the underlying record content. Responsibility for the creation and accuracy of the underlying record rests entirely with the organization that created it.

✓ This portal canVerify record integrity via hash comparison. Confirm evidence file hashes match the sealed manifest. Display record metadata and test details.

SHA-256 Hash Verification

Record Metadata

Drug Test Details

Evidence Manifest

Evidence Access Limitation

This portal verifies evidence integrity by cryptographic hash comparison only. Evidence files (photos, laboratory reports, supporting documents) are stored in a secure, access-controlled vault. To obtain copies, contact the employer who created this record. The employer can export a complete evidence package from their authenticated TestLedger dashboard.

© 2026 TestLedger LLC. All rights reserved.