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Guides on document timestamping, file integrity, and cryptographic proof.
How to Timestamp a Document and Prove It Existed Before a Certain Date
Learn how to create cryptographic proof a document existed at a specific moment — without relying on metadata or third parties.
How to Timestamp a PDF for Legal Proof
Need to prove a PDF existed at a specific moment? Learn how to create a verifiable, legally defensible timestamp without storing the file.
What Is Proof of Existence for a Document?
Proof of existence creates a verifiable record that a document existed at a specific moment — without revealing its contents.
How to Protect Your Intellectual Property Before Sharing It
Before you share a design, code, or creative work, protect yourself with a cryptographic timestamp. Takes under two minutes.
How to Prove You Sent a File on a Specific Date
Email receipts can be faked and cloud timestamps disputed. Here's how to create an irrefutable record proving you sent a specific file at a specific moment.
What Is SHA-256 and How Does It Prove File Integrity?
SHA-256 creates a unique fingerprint of any file. Learn how it works and why it's the gold standard for proving a document hasn't been tampered with.