Answer: checking SHA-256
How to check a SHA-256 checksum on Windows and MacUse PowerShell or certutil on Windows and shasum on a Mac, then compare with the published value
TimeBinder adds a layer of protection against AI and human fraud and disputes.
The file stays on your device. Your browser makes a digital fingerprint of the file. TimeBinder records the fingerprint and the time, not the file.
Short answer
On Windows, run Get-FileHash file.ext -Algorithm SHA256 in PowerShell, or certutil -hashfile file.ext SHA256 in Command Prompt. On a Mac, run shasum -a 256 file.ext in Terminal. Then compare the result with the checksum the publisher lists. If every character matches, your copy is identical to the one they hashed.
The commands
Windows (PowerShell): Get-FileHash C:\path\file.ext -Algorithm SHA256. Microsoft documents this command (Get-FileHash). Windows (Command Prompt): certutil -hashfile file.ext SHA256.
macOS (Terminal): shasum -a 256 file.ext. You can drag the file into the Terminal window to fill in its path.
Compare the output with the value the publisher lists, ideally from a separate trusted page. Hexadecimal case does not matter, but every character must match. See how to verify a downloaded file.
Without the command line
If you prefer not to use a terminal, the SHA-256 file hash checker works in your browser, and the file is not uploaded. A TimeBind records a SHA-256 fingerprint of the exact file and a time, anchored to Bitcoin. The fingerprint is made in your browser and the file is not uploaded.
A matching checksum shows two files are identical. It does not show the file is safe or who made it.
First Pooled TimeBind free, no card, then from US$5. An ASAP TimeBind is US$15.
Frequently asked questions
Is Get-FileHash safe to use?
It is a built-in PowerShell command that reads the file and prints a hash. It does not change the file.
Why does my checksum not match?
The file differs from the one hashed. A broken download, a different version or an edit are common causes. Download it again from the official source.
Which algorithm should I pick?
Use the one the publisher lists. Where you have the choice, prefer SHA-256 over MD5 or SHA-1.
Does the checksum depend on the file name?
No. Only the file contents matter, so renaming a file does not change its SHA-256.
Sources
- Microsoft, Get-FileHash.
- TimeBinder, SHA-256 file hash checker.
Related guides and tools
Record a fingerprint of the file you rely on
Add a layer of protection against AI and human fraud and disputes: a dated, checkable record of the exact file you hold.
- Open the app and sign in with email or Google.
- Add your files. They stay on your computer.
- Seal them and download your Proof of Time certificates.
First Pooled TimeBind free, no card, then from US$5. See pricing.