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Signature Verification Page

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Fingerprint check

You may use this form to confirm whether a PDF file really came from us by checking its fingerprint against our logs.

Signing Certificates History

Below is the list of signing certificates this website has used to sign PDFs. You may download the associated PEM file to allow Acrobat Reader to verify signatures.

From 2022-11-18 13:07:56 UTC to 2022-11-22 19:00:00 UTC, we've signed documents using a certificate for: archive.social.
See: certificate transparency records for this certificate, certificate file.

From 2022-11-22 13:07:56 UTC to 2023-02-07 19:36:15 UTC, we've signed documents using a certificate for: lil.law.harvard.edu.
See: certificate transparency records for this certificate, certificate file.

From 2023-02-07 13:36:15 UTC to present, we've signed documents using a certificate for: lil.law.harvard.edu.
See: certificate transparency records for this certificate, certificate file.

Timestamping Certificates History

Below is the list of timestamping certificates this website has used to sign PDFs. You may download the associated CER file to allow Acrobat Reader to verify signatures.

From 2022-11-18 13:07:56 UTC to present, we've signed documents using the following timestamping server: timestamp.digicert.com.
See: certificate transparency records for this certificate, certificate file.

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Check a PDF

This tool verifies that a given .pdf file was created by archive.social by matching its fingerprint against our logs.

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