ブロックチェーンタイムスタンプ——技術に詳しくないクリエイター向け解説

You don't need to understand how an engine works to drive a car. And you don't need to understand cryptography to protect your work with a blockchain timestamp. But if you're curious about what's happening under the hood, this guide is for you.

What Is a Blockchain Timestamp?

A blockchain timestamp is a permanent record that a specific piece of data existed at a specific point in time. Think of it like a notary stamp — but digital, instant, and impossible to forge.

When you create a timestamp, your computer generates a unique "fingerprint" of your file (called a hash). This fingerprint is so precise that changing even a single pixel in an image would produce a completely different one. That fingerprint, along with the exact time, is then written to a blockchain — a global, public ledger that no one can edit or delete.

Why It's More Reliable Than Other Methods

Emails can be forged. Screenshots can be faked. File metadata can be edited. Cloud storage dates can be disputed. But a blockchain timestamp can't be altered because it's stored on thousands of computers worldwide, verified by mathematical proof, not by any company or person.

The blockchain doesn't care who you are, where you live, or whether Prima Evidence exists tomorrow. Your proof lives on the network independently, verifiable by anyone, forever.

Your File Never Leaves Your Device

This is the part that surprises most people. When you timestamp a file, the file itself goes nowhere. Your computer creates the fingerprint locally — in your browser — and only that fingerprint is sent to the blockchain. We never see your work. We never store your work. We couldn't access it even if we wanted to.

What gets stored on the blockchain is the fingerprint and the timestamp. If you ever need to prove your work existed at that time, you simply show that the same file produces the same fingerprint — and point to the immutable blockchain record.

How to Get Started

Drop your file. Get your proof. That's genuinely it. The whole process takes about 30 seconds. You'll receive a certificate with your proof ID and a link to verify it on the blockchain anytime.

No technical knowledge. No blockchain wallet. No cryptocurrency. Just your file and 30 seconds.