Dated proof of prior existence helps show that a file existed on a specific date and has not been changed since. It is an important element in protecting a creation, professional content or any document that needs a reliable date.
With this mechanism, you can show that you had a file before sharing, publishing or sending it to a third party.
In a legal context, such dated proof may serve as evidence and provide additional assurance in a dispute, a challenge or document validation.
This page also explains how Authenk lets you generate reliable proof of prior existence that may be used in a legal context.
Why do you need reliably dated proof?
Many professionals and creators need to establish the origin and date of their documents:
- designers, artists and photographers
- developers and digital creators
- businesses and independent professionals
- engineers, technical projects and prototypes
- law firms
- trainers and consultants
- writers, researchers and scientists
Proof of prior existence can help protect:
- an idea
- a concept
- a technical document
- source code
- a brochure
- an artistic creation
- an internal report
- sensitive content
It is especially useful when you need to share a document but want a dated record of your connection to it.
In many professional situations, genuine proof of prior existence is a valuable way to protect your content.
What is dated proof used for?
It may be used to:
- help prove that a creation belongs to you
- date a document before an official filing
- protect a concept or prototype
- support your case in a dispute
- secure the transmission of sensitive files
- establish the integrity of a legal document
How does Authenk create proof of a document’s prior existence?
During certification, Authenk calculates the file’s unique cryptographic fingerprint using a secure algorithm. The fingerprint is then timestamped and recorded in a tamper-resistant public journal.
The system generates a PDF certificate containing:
- the file’s fingerprint
- the date and time of certification
- authenticity information
- proof of integrity
This process makes it possible to provide proof of prior existence for any type of file without exposing its contents.
You can share or keep this certificate as a lasting record of evidence.
One of Authenk’s main benefits is that no files are stored: only their cryptographic fingerprints are retained, protecting the confidentiality of the data.
When should you use a chronological record?
Here are some practical examples:
- prove a project’s existence before an official filing
- protect a design or prototype before presenting it
- date an important internal document
- archive sensitive files in a regulated setting
- document the authorship of an idea or text before publication
- secure the exchange of documents between partners
- build a record for a challenge or dispute
For businesses, evidence of a document’s prior existence plays an important role in innovation, compliance and document approval processes.
This mechanism makes it easy for every user to create verifiable proof of prior existence.
Verify a file’s authenticity
Any proof generated with Authenk can be verified independently.
Simply submit the file or certificate to recalculate its fingerprint and compare it with the one recorded in the journal.
Visit the Verify a file page to perform a verification.
This step confirms whether proof of prior existence matches the file being examined.
Get your proof of prior existence
To create your first reliable chronological record, you need an Authenk account. The platform provides a dashboard to manage your certified files, certificates, dated proofs and history.
Once signed in, you can upload any document to generate a dated record based on its unique cryptographic fingerprint. Secure timestamping provides a reliable, tamper-resistant date to help protect your creations, professional documents and sensitive content.
The simple, intuitive interface lets you create proof before publication in seconds, without technical skills. Each certificate can then be archived, verified or shared with third parties in professional or regulatory settings.
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With Authenk, you can create proof of prior existence easily, durably and securely.
Durable and independent protection
Authenk’s proof of creation is part of a long-term approach to protection. Unlike conventional storage or simply sending an email, the method relies on a tamper-resistant cryptographic mechanism. The file’s fingerprint remains valid regardless of the original document’s storage medium, size or format. Even if you move the file, change computers or archive your data for years, the record of prior existence remains verifiable and may be used as evidence.
This independent approach is particularly useful for organizations that need lasting proof, including after IT migrations or changes of tools. The structure of Authenk’s public journal supports continuity of the record and reliable verification without exposing certified files.
This approach gives you a simple, robust way to show the exact date on which a file existed while retaining control over your data.
To learn more about international standards for managing and protecting digital documents, you can read the recommendations published byISO.