Learn by trying it

Change one detail.
See why it matters.

A record can look convincing and still have changed. Explore what a verification check helps you notice.

First, the big picture

Three questions behind a useful check.

Who signed this record?
Does it match the signed version?
Is the record still active?

Choose a sample, change a detail, and compare the result. This is an illustration of the user experience, not a live record.

The issuer’s statement still needs context. A signature verifies the source and integrity of the signed information; it does not independently establish every claim as fact.

SAMPLE RECORD / 001

Certificate of completion

Introduction to product design

Issued by: Example Academy
Issued to: Alex Morgan

Completed the course

RECORDED FINGERPRINT8f42…a60d

Matches the signed record

The sample issuer, signature, and content match. The record has not been revoked.

An illustrative example, not a live verification. A signature checks the source and integrity of a record, not whether every claim is true.

Now try a real calculation

Meet the digital fingerprint.

A fingerprint is a short representation calculated from content. This local example compares two fingerprints. It does not sign a record or verify an issuer.

Edit this sample record

Change 480 to 4,800, then compare its fingerprint.

A small change makes a different fingerprint.

Run the check to calculate the actual SHA-256 fingerprints in your browser. This example sends no text to a server.

Your next step

Start with one thing you need to prove.

Try an example, choose your workspace, and build from there.

Find your starting point Try the demo

Learn by trying it

Change one detail.
See why it matters.

A record can look convincing and still have changed. Explore what a verification check helps you notice.

First, the big picture

Three questions behind a useful check.

Who signed this record?
Does it match the signed version?
Is the record still active?

Choose a sample, change a detail, and compare the result. This is an illustration of the user experience, not a live record.

The issuer’s statement still needs context. A signature verifies the source and integrity of the signed information; it does not independently establish every claim as fact.

SAMPLE RECORD / 001

Certificate of completion

Introduction to product design

Issued by: Example Academy
Issued to: Alex Morgan

Completed the course

RECORDED FINGERPRINT8f42…a60d

Matches the signed record

The sample issuer, signature, and content match. The record has not been revoked.

An illustrative example, not a live verification. A signature checks the source and integrity of a record, not whether every claim is true.

Now try a real calculation

Meet the digital fingerprint.

A fingerprint is a short representation calculated from content. This local example compares two fingerprints. It does not sign a record or verify an issuer.

Edit this sample record

Change 480 to 4,800, then compare its fingerprint.

A small change makes a different fingerprint.

Run the check to calculate the actual SHA-256 fingerprints in your browser. This example sends no text to a server.

Your next step

Start with one thing you need to prove.

Try an example, choose your workspace, and build from there.

Find your starting point Try the demo

Change one detail.See why it matters.

Three questions behind a useful check.

Introduction to product design

Meet the digital fingerprint.

A small change makes a different fingerprint.

Start with one thing you need to prove.

Change one detail.See why it matters.

Three questions behind a useful check.

Introduction to product design

Meet the digital fingerprint.

A small change makes a different fingerprint.

Start with one thing you need to prove.

Change one detail.
See why it matters.

Change one detail.
See why it matters.