Title: DateSealed
Author: egosaru
Published: <strong>November 5, 2026</strong>
Last modified: November 5, 2026

---

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![](https://ps.w.org/datesealed/assets/banner-772x250.png?rev=3786325)

![](https://ps.w.org/datesealed/assets/icon-256x256.png?rev=3786325)

# DateSealed

 By [egosaru](https://profiles.wordpress.org/egosaru/)

[Download](https://downloads.wordpress.org/plugin/datesealed.0.1.0.zip)

 * [Details](https://wordpress.org/plugins/datesealed/#description)
 * [Reviews](https://wordpress.org/plugins/datesealed/#reviews)
 *  [Installation](https://wordpress.org/plugins/datesealed/#installation)
 * [Development](https://wordpress.org/plugins/datesealed/#developers)

 [Support](https://wordpress.org/support/plugin/datesealed/)

## Description

When you publish or update a post, DateSealed calculates a SHA-256 hash of the post
text (and, optionally, the featured image file) on your server and sends **only 
that hash** to the DateSealed service. The service returns a signed time stamp (
RFC 3161) immediately and anchors the hash in a Bitcoin block through OpenTimestamps
within hours. Anchored records can be verified from the Bitcoin ledger alone, even
if the service disappears.

 * Automatic: a new record on every publish and update; earlier records are kept
   as a history.
 * Private: the text, images and URLs of your posts are never sent.
 * Badge: a small line after the post with the record date and a link to the record
   page (you can turn it off).
 * Admin: a “DateSealed” column in the post list and a box on the edit screen.

Records made with this tool do not guarantee legal effect. If you need an accredited
timestamp (certified by Japan’s Minister of Internal Affairs and Communications),
please use an accredited provider.

#### External service

This plugin connects to the DateSealed service (https://datesealed.com), operated
by Lightscend Co., Ltd., to create and check records.

 * What is sent: the SHA-256 hash (64 hexadecimal characters) of the post text, 
   and optionally of the featured image file; the site URL appears in the User-Agent
   header. Nothing else.
 * When: when a post is published or updated (sent from WP-Cron shortly afterwards),
   when you click “Record now”, and twice a day to ask whether pending records have
   been anchored.
 * Terms and privacy: https://datesealed.com/terms

## Screenshots

[⌊Settings: choose when to record, which post types, the badge and the service URL.⌉⌊
Settings: choose when to record, which post types, the badge and the service URL
.⌉[

Settings: choose when to record, which post types, the badge and the service URL.

[⌊The post list shows the record status of every post.⌉⌊The post list shows the 
record status of every post.⌉[

The post list shows the record status of every post.

[⌊The badge after a post: the date it was recorded, with a link to the record page.⌉⌊
The badge after a post: the date it was recorded, with a link to the record page
.⌉[

The badge after a post: the date it was recorded, with a link to the record page.

[⌊The record page: the signed time stamp, the Bitcoin anchoring status and the proof
files you can verify yourself.⌉⌊The record page: the signed time stamp, the Bitcoin
anchoring status and the proof files you can verify yourself.⌉[

The record page: the signed time stamp, the Bitcoin anchoring status and the proof
files you can verify yourself.

## Installation

 1. Upload the `datesealed` folder to `/wp-content/plugins/` and activate it.
 2. Open Settings > DateSealed to choose the post types and the badge.

## FAQ

### Is my content uploaded?

No. Only the hash is sent.

### What happens when I edit a post?

The hash changes, so a new record is created; the earlier ones stay in the history.

### Does it work if WP-Cron is disabled?

Run `wp cron event run --due-now` from a real cron job.

## Reviews

There are no reviews for this plugin.

## Contributors & Developers

“DateSealed” is open source software. The following people have contributed to this
plugin.

Contributors

 *   [ egosaru ](https://profiles.wordpress.org/egosaru/)

[Translate “DateSealed” into your language.](https://translate.wordpress.org/projects/wp-plugins/datesealed)

### Interested in development?

[Browse the code](https://plugins.trac.wordpress.org/browser/datesealed/), check
out the [SVN repository](https://plugins.svn.wordpress.org/datesealed/), or subscribe
to the [development log](https://plugins.trac.wordpress.org/log/datesealed/) by 
[RSS](https://plugins.trac.wordpress.org/log/datesealed/?limit=100&mode=stop_on_copy&format=rss).

## Changelog

#### 0.1.0

 * First release.

## Meta

 *  Version **0.1.0**
 *  Last updated **1 day ago**
 *  Active installations **Fewer than 10**
 *  WordPress version ** 5.8 or higher **
 *  Tested up to **7.1.4**
 *  PHP version ** 8.2 or higher **
 * Tags
 * [copyright](https://wordpress.org/plugins/tags/copyright/)[proof](https://wordpress.org/plugins/tags/proof/)
   [seo](https://wordpress.org/plugins/tags/seo/)[timestamp](https://wordpress.org/plugins/tags/timestamp/)
 *  [Advanced View](https://wordpress.org/plugins/datesealed/advanced/)

## Ratings

No reviews have been submitted yet.

[Your review](https://wordpress.org/support/plugin/datesealed/reviews/#new-post)

[See all reviews](https://wordpress.org/support/plugin/datesealed/reviews/)

## Contributors

 *   [ egosaru ](https://profiles.wordpress.org/egosaru/)

## Support

Got something to say? Need help?

 [View support forum](https://wordpress.org/support/plugin/datesealed/)