# Schema Output


The JSON-LD listed below is proposed (opens new window) to be merged with Schema.org and is subject to change.

# Adding a timestamp

  "@context": "https://schema.org",
  "@type": "Article",
  "timestamp": {
    "@type": "BlockchainTransaction",
    "identifier": "0fce9c929ef03838775703d4cf55b7b1bdd6a5cc3503a2606dbe3b6c0cf0a802",
    "hash": "8A258E516081C36B866812E49495628CBDC1DD4126DB321A28AE95EE55B83BAB",
    "hashLink": "https://example.com/json/?hash=8A258E516081C36B866812E49495628CBDC1DD4126DB321A28AE95EE55B83BAB",
    "recordedIn": {
      "@type": "Blockchain",
      "name": "eosio_main"

Please make sure you return an endpoint in the hashLink parameter which in turn return the HashInput object. You could use the hash as a unique identifier for different revisions or articles.

# HashInput

  "@context": "https://schema.org",
  "@type": "HashInput",
  "dateCreated": "2020-09-27T20:28:41+01:00",
  "isBasedOn": "https://example.com/time-stamped-article/",
  "text": "<h1>Nunc eget lorem dolor sed</h1>\t\t\n\t\t\t<h2>Suspendisse sed nisi lacus sed viverra tellus.</h2>\t\t\n\t\t\t<p>Non consectetur a erat nam at lectus urna. Ut porttitor leo a diam sollicitudin tempor id eu.</p>..."

If you want to use the HashInput to create a hash yourself, make sure to hash the minified, UTF-8 encoded string representation of the JSON object.

# Display a certificate

With the Schema in place, you can use the certificate from our UIKit. The language will be determined by the lang the attribute in the HTML tag. Other options for w-certificate can be found on the dedicated documentation page (opens new window).

As we use web components, no frontend framework is required, and the size of the requested scripts is small.


Fonts are not loaded properly currently. This will be fixed in a future update.

<html lang="en">
    <script defer type="module" src="https://unpkg.com/@wordproof/uikit/dist/uikit/uikit.esm.js"></script>
    <script defer nomodule src="https://unpkg.com/@wordproof/uikit/dist/uikit/uikit.js"></script>

    <script type="application/ld+json">{"@context": "http://schema.org", ..., "timestamp": { ... }}</script>