Timestamp your work.
Prove you made it first.
Copytok creates a private, blockchain-anchored timestamp for your videos, writing, patents, documents, images, and other original work — giving you independently verifiable proof of when your work existed without publishing the work itself.
No public upload. No wallet required. Just a certificate.
Timestamp and protect every kind of original work.
If it can be a file, it can be timestamped. Copytok creates a verifiable record of your exact work at a specific point in time — whether it is a video, manuscript, document, image, research paper, or invention record.
Video
Films, footage, edits, animation, and raw cuts before they ever leave your drive.
Writing
Manuscripts, scripts, articles, lyrics — the exact draft, the exact day.
PDFs and documents
Contracts, decks, proposals — anything you need a clean paper trail on.
Whitepapers
Research, technical papers, and proposals — dated before anyone else reads them.
Patents and inventions
Filings, disclosures, and invention records — proof of the moment an idea took shape.
Images and artwork
Photography, illustration, design, and artwork, from sketch to final file.
Proof of when your work existed.
Copytok is a digital timestamping and proof-of-existence service for creators, inventors, researchers, and businesses. Create a verifiable record of a specific file at a specific point in time without making the underlying work public. Use Copytok for manuscripts, videos, photographs, designs, research, technical documents, invention records, and other original work.
Three steps. A permanent record.
Nothing about creating a certificate should slow you down, or expose your work before you're ready to share it.
Upload
Drop in your file. It stays private — we never publish, preview, or share it with anyone, including ourselves.
Create a proof fingerprint
Your work is transformed into a unique proof phrase and anchored to a public blockchain, creating a permanent record associated with that exact work.
Receive your certificate
You receive a certificate anyone can independently verify — without ever seeing the work it protects.
Upload a file. Get a fingerprint. Certify it.
This is a live demo, running entirely in your browser. Type some text and/or drop in a file — each gets its own live proof phrase. Spend a demo credit to mint a certificate with its own QR code, or decode any phrase straight back into its original hash.
This happens locally in your browser. Nothing you type or upload here is stored or sent anywhere.
A timestamp no one controls, including us.
Copytok doesn't keep the record in a database we could edit later. It's anchored to a public ledger, which is what makes the date independently verifiable.
Created
You finish a draft, a cut, a filing — the moment your work exists.
Fingerprint created
A unique proof phrase is generated from the work. Change the underlying work and the proof changes.
Anchored
The proof is written to a public blockchain, creating a permanent timestamped record.
Verifiable
Anyone can confirm the certificate without asking Copytok to alter or approve the record.
Built for the moment before the dispute.
Creators and inventors can establish a timestamped record before sharing work with clients, publishers, investors, collaborators, or the public.
"I timestamp every cut before it goes to a client. If a rough edit ever leaks, I can prove which version was mine."
"I certified the manuscript before it went to a single agent. It costs nothing to be safe with three years of work."
"Between the sketch and the filed patent there's a gap. Copytok covers that gap with a record I can point to."
"Reverse image search only tells you a copy exists. This tells you, provably, whose file came first."
"We certify findings the day we write them up, long before submission. It's a quiet form of insurance."
"Every stem I send out gets certified first. It's five minutes, and it's the difference in a dispute."