Use cases

DfinA Vault in everyday life

Whenever a file's date or integrity matters, you get a clear, lasting proof, without ever sharing the file. Here are concrete cases.

Freelancers & small businesses

Date quotes, invoices and contracts the moment you send them.

Example: a client disputes a quote's date. Your certificate proves it existed, unchanged, that day.

Photographers & videographers

Establish the priority of a photo or video before publishing.

Example: an image is reused without permission. You prove your original file existed earlier.

Musicians & authors

Timestamp a demo, lyrics or a manuscript before sharing them.

Example: you send a demo to a label. The proof attests its date and exact content.

Designers & studios

Timestamp mockups, concepts and client deliverables.

Example: a concept shown in a pitch is dated, proving your priority on the delivered idea.

Developers & researchers

Prove the existence of code, a dataset or an idea at a date, without publishing anything.

Example: a .zip archive of your project is dated as proof of priority.

Families & individuals

Date an inventory, an important letter, a child's creation, a memory.

Example: move-in inventory photos are dated and tamper-proof in case of dispute.

The third anchor · optional

And with the seal

On unlimited plans, affix your personal mark: your files are no longer merely dated, they bear your mark.

A recognizable body of work

Affix your seal to each shot; your clients learn to recognize your mark.

Example: a photo is stolen from you. You meet a signature challenge the thief cannot meet, and your timestamp is earlier.

Signed deliverables

Every deliverable bears the studio's mark; one motif links your whole output.

Example: a former collaborator claims a piece of work. Only the studio can reproduce the seal that accompanies it.

A body of work that holds together

Link drafts, versions and manuscripts with one mark: continuity speaks for you.

Example: you show that a series of demos comes from you, dated and sealed with the same motif.

A diving club

A club validates its members' dives, with details of each outing. But logbooks are sometimes falsified to gain levels faster, an international problem where a forged document can, step by step, put lives at risk.

By certifying each dive sheet (fingerprint and date) and affixing the club's seal, the sheet becomes tamper-proof, dated, and attributed to an identifiable club.

Discover the seal

All formats

What you can certify

Any file, up to 2 GB. Only its fingerprint is computed; the file stays on your device.

PDFs & documentsImages (JPG, PNG, RAW…)VideosAudioZIP archivesSource codeSpreadsheetsAny other file

A file that matters?

Date it in seconds. Local computation, no file sent, certificate verifiable at any time.

Certify a file