SealDoc — independently verifiable
Compliance infrastructure for legally provable documents
SealDoc — independently verifiable launched on July 22, 2026 with 3 votes, #8,766 of 24,623 launches that month and more than 50% of that year's launches.
What it does
SealDoc proves document integrity long after signing. Every document includes cryptographic timestamps, tamper-evident audit trails, and portable Evidence Packs for compliance, archiving, and independent verification.
SealDoc seals every document with a cryptographic timestamp, tamper-evident audit trail, and a Legal Evidence Pack.
SealDoc converts your document to PDF/A-3 and records a tamper-evident SHA-384 chain of evidence events. Timestamping under RFC 3161 is available per document, and you download a Legal Evidence Pack with the document, its hash manifest and its audit trail. Most businesses assume their invoices and records are legally protected. They are often wrong about the proof layer. A standard PDF may be accepted as a document, but it rarely proves integrity, timestamp, custody, or retention on its own. Most PDFs can be modified without detection. ERP and accounting software are built to process transactions, not to produce independently verifiable proof of existence and integrity. That is a different…from sealdoc.eu
Does a similar job
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Let's Seal – Let's Encrypt for document signing, free and self-hostedJul 2026 · github.com · ▲94TLDR, Let's Seal gives the finger to Adobe and every doc signing tool (docusign, google, etc) who pay to play with the Adobe Approved Trust List and then charge you for something that should be free. Currently even the person checking if a document/contract is sealed or code is authentic has to also be inside the same Adobe walled garden too. Verification, the part that should be free is the part everyone charges for. Thats the shape Let's Encrypt fixed for TLS, and I wanted the same thing for documents and files. The core idea therefore needed to go a bit beyond e signatures and i…
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