.TSR FILE READER / VIEWER

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Verify the Authenticity of a Certified Press Release (.tsr Viewer)

Confirm integrity and legal validity of press releases with our RFC 3161 timestamp verifier. Client-side processing • SHA-256 hash match • eIDAS-grade proof of existence

Use the official .tsr (TimeStamp Response) file delivered with each certified press release to verify authenticity. Processing happens locally in your browser — no files are uploaded to our servers.

What the Verification Confirms

SHA-256 Integrity Exact match between the document hash and the hash sealed inside the .tsr file.

RFC 3161 Timestamp Trusted time evidence proving the press release existed at a specific date and time (eIDAS-compliant if selected).

JSON Evidence Machine-readable technical details (hash, timestamp, TSA signature) for audit and chain of custody.

Privacy by Design Verification runs client-side. Nothing leaves your browser.

Court-Ready Evidence aligned with eIDAS and digital forensics best practices, suitable for independent checks.

Direct Access Launch the verifier: tsr-viewer.certifiedpressreleases.com

Page Overview

What is a .tsr file?

A .tsr (TimeStamp Response) is the official receipt issued by a trusted timestamp authority (TSA). It includes the timestamp, the SHA-256 hash of the content, and the TSA digital signature. When the hash in the .tsr matches your document’s hash, integrity is proven; the valid timestamp proves existence at that time.

How the verification works

Steps

Open the verifier: tsr-viewer.certifiedpressreleases.com
Upload the .tsr file received with the certified press release (max 10 KB).
(Optional) Paste the document’s SHA-256 hash to compare, or calculate it locally.
Click Verify and check for HASH MATCH and a valid timestamp.

How to compute SHA-256 locally

macOS / Linux: sha256sum file.pdf
Windows: certutil -hashfile file.pdf SHA256

Legal and forensic relevance

The RFC 3161 timestamp is a digital proof of existence recognized under European frameworks (eIDAS). Combined with the SHA-256 integrity check, it provides strong evidence that a press release is authentic and unaltered since certification, supporting compliance, audits, and independent expert verification.

Prevents backdating and tampering allegations.
Enables verifiable audit trails for corporate communications.
Facilitates verification by courts, regulators, and forensic experts.

Ready to verify? Open the viewer here: tsr-viewer.certifiedpressreleases.com

Privacy & Security

The verifier is hosted on a hardened subdomain and designed for client-side processing. Files and hashes do not leave your browser. You may also download a JSON with technical details (timestamp, hash, TSA info) to preserve your chain of custody.

Disclaimer: if any discrepancy arises between a web transcription and the certified PDF, the digitally signed PDF remains the only legally valid reference.

Start the Verification

Launch the .tsr viewer now: tsr-viewer.certifiedpressreleases.com

CertifiedPressReleases.com helps organizations publish, archive, and verify tamper-proof press releases with SHA-256 hashing and eIDAS-grade timestamps.

Visit https://contentprotector.eu/