Title: Clockdo – Publish Date Proof & Content Timestamp Author: ray5051 Published: June 22, 2026 Last modified: June 22, 2026 --- Search plugins ![](https://s.w.org/plugins/geopattern-icon/coremix-publish-date-proof.svg) # Clockdo – Publish Date Proof & Content Timestamp By [ray5051](https://profiles.wordpress.org/ray5051/) [Download](https://downloads.wordpress.org/plugin/coremix-publish-date-proof.0.1.1.zip) * [Details](https://wordpress.org/plugins/coremix-publish-date-proof/#description) * [Reviews](https://wordpress.org/plugins/coremix-publish-date-proof/#reviews) * [Installation](https://wordpress.org/plugins/coremix-publish-date-proof/#installation) * [Development](https://wordpress.org/plugins/coremix-publish-date-proof/#developers) [Support](https://wordpress.org/support/plugin/coremix-publish-date-proof/) ## Description Clockdo helps WordPress site owners protect their publish date by generating a verifiable content timestamp. When your post goes public, Clockdo creates a deterministic fingerprint (SHA-256) and requests an OpenTimestamps proof. This allows you to independently verify that your content existed at a specific time — useful for documentation, plagiarism disputes, and publish date verification. ### Features * Generate per-post timestamp records * Request OpenTimestamps proof * Export .ots and manifest files * Optional public meta tags and post footer with verification link * Independent verification using standard tools ### Use Cases * Prove when an article was first published * Add a visible publication record to your posts * Protect against plagiarism disputes * Maintain an independent timestamp history * Provide verification material for disputes or takedown cases English (Summary) * Generate per-post records and proof history in the dashboard.* Save proof artifacts to your WordPress uploads folder. * Optionally inject public meta tags and/or a “Verify” footer link. * Proofs are designed to be independently verifiable with standard OpenTimestamps tools. ### Privacy This plugin may collect and store: * WordPress post metadata (post ID, URL, timestamps),* deterministic hashes (SHA-256), * proof IDs/statuses, * proof artifacts written to local disk under `wp-content/uploads/clockdo-ots-private/`. Outbound requests: * This plugin connects to a remote timestamping API (configured by you) to request proofs. * Depending on configuration, it may upload `manifest. json` and/or `export.json` (which can include post title and content). Public disclosure: * If you enable meta injection or public verify links, your public pages may expose a hash/canonicalization identifier and a verification link. See the included docs (for operators): * `assets/docs/privacy.md` * `assets/docs/ third_party_services.md` * `assets/docs/data_deletion_uninstall.md` ### Third Party Services This plugin connects to the following external services: 1. **Clockdo Timestamping API** (`ots-api.clockdo.com`) 2. * Used to register sites, submit timestamp requests, and check proof status. * Endpoints called: `/api/v1/public/sites`, `/api/v1/public/site-stamps`, `/api/ v1/site/me`, `/api/v1/stamps/{id}/` * Data sent: site domain, post URL, SHA-256 hash, manifest/export JSON. * Service homepage: [https://ots.clockdo.com](https://ots.clockdo.com) * Privacy policy: [https://ots.clockdo.com/privacy](https://ots.clockdo.com/privacy) * Terms of service: [https://ots.clockdo.com/terms](https://ots.clockdo.com/terms) 3. **Clockdo Verification Page** (`ots-verify.clockdo.com`) 4. * If public verify links are enabled, post pages may link to this domain for independent proof verification. All outbound connections are made via the WordPress HTTP API (`wp_remote_post` /` wp_remote_get`). The API Base URL is configurable; the above domains are defaults. See also: `assets/docs/third_party_services.md` ### Uninstall Uninstall removes plugin options and database tables, but proof files may remain. To fully remove local data, delete `wp-content/uploads/clockdo-ots-private/` after uninstall. ### Disclaimer This plugin provides timestamping and verification tooling. It is not legal advice, not a certification service, and does not determine ownership. ## Installation 1. Upload the plugin folder to `/wp-content/plugins/` or upload the ZIP via Plugins- > Add New -> Upload Plugin. 2. Activate the plugin. 3. Go to the plugin Settings page and set your API Base URL and fetch/save your Site ID. 4. Publish a post and submit a record, or use the batch submit button in the dashboard. ## FAQ ### Is this a copyright registration? No. This plugin creates a verifiable timestamp record. It does not register copyright or determine legal ownership. ### Can this help in disputes? It provides independent timestamp evidence that may support your documentation process. Legal outcomes depend on jurisdiction and additional evidence. ### Does this prove ownership/copyright? No. It proves that a specific fingerprint existed by a certain time (via an OTS proof). Ownership depends on broader evidence and jurisdiction. ### What data is timestamped? A SHA-256 fingerprint of a canonical representation of content and/or a manifest that references it. ### Where are proof files stored? Locally on your WordPress server (uploads directory). If you purchase a separate hosted plan, proofs may also be hosted by the Clockdo service (manifest + .ots only). ### Will this affect SEO? Meta tags do not duplicate content. If you enable a public footer link, consider` rel="nofollow"` by default. ## Reviews There are no reviews for this plugin. ## Contributors & Developers “Clockdo – Publish Date Proof & Content Timestamp” is open source software. The following people have contributed to this plugin. Contributors * [ ray5051 ](https://profiles.wordpress.org/ray5051/) [Translate “Clockdo – Publish Date Proof & Content Timestamp” into your language.](https://translate.wordpress.org/projects/wp-plugins/coremix-publish-date-proof) ### Interested in development? [Browse the code](https://plugins.trac.wordpress.org/browser/coremix-publish-date-proof/), check out the [SVN repository](https://plugins.svn.wordpress.org/coremix-publish-date-proof/), or subscribe to the [development log](https://plugins.trac.wordpress.org/log/coremix-publish-date-proof/) by [RSS](https://plugins.trac.wordpress.org/log/coremix-publish-date-proof/?limit=100&mode=stop_on_copy&format=rss). ## Changelog #### 0.1.0 * MVP release: record generation, proof requests, dashboard UI, local storage, optional public meta/link. ## Meta * Version **0.1.1** * Last updated **1 week ago** * Active installations **Fewer than 10** * WordPress version ** 6.0 or higher ** * Tested up to **7.0** * PHP version ** 7.4 or higher ** * Tags * [content-protection](https://wordpress.org/plugins/tags/content-protection/)[copyright](https://wordpress.org/plugins/tags/copyright/) [plagiarism](https://wordpress.org/plugins/tags/plagiarism/)[publish date](https://wordpress.org/plugins/tags/publish-date/) [timestamp](https://wordpress.org/plugins/tags/timestamp/) * [Advanced View](https://wordpress.org/plugins/coremix-publish-date-proof/advanced/) ## Ratings No reviews have been submitted yet. [Your review](https://wordpress.org/support/plugin/coremix-publish-date-proof/reviews/#new-post) [See all reviews](https://wordpress.org/support/plugin/coremix-publish-date-proof/reviews/) ## Contributors * [ ray5051 ](https://profiles.wordpress.org/ray5051/) ## Support Got something to say? Need help? [View support forum](https://wordpress.org/support/plugin/coremix-publish-date-proof/)