Content Attestation of Article Type

Terminology

For terms not explained in this document, please see Terminology.

• Content Attestation (CA)

Article Data Model

Complies with Content Attestation.

Property

Article Properties

Name	Type	Description
@context	string[]	REQUIRED. It MUST comply with OP VC Data Model. Additionally, the third value MUST be "https://originator-profile.org/ns/cip/v1".
type	string[]	REQUIRED. It MUST be ["VerifiableCredential", "ContentAttestation"].
issuer	string	REQUIRED. It MUST be the OP ID of the CA issuer.
credentialSubject	object	REQUIRED. A JSON-LD Node Object containing the following credentialSubject properties.
allowedUrl	string | string[]	REQUIRED. Properties defined for Content Attestation. It MUST NOT be an empty array.
target	object[]	REQUIRED. Properties defined for Content Attestation. It MUST NOT be an empty array.

credentialSubject Properties

Name	Type	Description
id	string	REQUIRED. MUST be a CA ID. CA ID is a UUIDv4 URN format string. There is a one-to-one correspondence between content and CA IDs.
type	string	REQUIRED. It MUST be Article.
headline	string	REQUIRED. Title of the content.
description	string	REQUIRED. A description of the content.
image	object	OPTIONAL. A thumbnail image for the content. RECOMMENDED if a thumbnail image is available. It MUST be a JSON-LD Node Object of type image datatype. This property allows you to verify the CA.
datePublished	string	OPTIONAL. The publication date and time. MUST be of the dateTimeStamp data type.
dateModified	string	OPTIONAL. The last modified date and time. MUST be of type dateTimeStamp data type.
author	string[]	OPTIONAL. An array of author names.
editor	string[]	OPTIONAL. An array of editor names.
genre	string	OPTIONAL. Genre.

note

The properties in credentialSubject were decided based on https://schema.org/Article. We plan to decide the extent to which we will comply with schema.org regarding the interpretation of each property and whether it is necessary or not, based on exchanges of opinions with companies that use OP.

Appendix

example

This section is non-normative.

Below is an example of Content.

{
  "@context": [
    "https://www.w3.org/ns/credentials/v2",
    "https://originator-profile.org/ns/credentials/v1",
    "https://originator-profile.org/ns/cip/v1",
    { "@language": "en" }
  ],
  "type": ["VerifiableCredential", "ContentAttestation"],
  "issuer": "dns:example.com",
  "credentialSubject": {
    "id": "urn:uuid:78550fa7-f846-4e0f-ad5c-8d34461cb95b",
    "type": "Article",
    "headline": "<Title of the Web page>",
    "image": {
      "id": "https://media.example.com/image.png",
      "digestSRI": "sha256-WNn1owxcJX6uwrNFOhPX+npz4j46s3a1cExjX5wWVxw="
    },
    "description": "<A description of Web page>",
    "author": ["Jane Smith"],
    "editor": ["John Smith"],
    "datePublished": "2023-07-04T19:14:00Z",
    "dateModified": "2023-07-04T19:14:00Z",
    "genre": "Arts & Entertainment"
  },
  "allowedUrl": ["https://media.example.com/articles/2024-06-30"],
  "target": [
    {
      "type": "VisibleTextTargetIntegrity",
      "cssSelector": "<CSS Selector>",
      "integrity": "sha256-GYC9PqfIw0qWahU6OlReQfuurCI5VLJplslVdF7M95U="
    },
    {
      "type": "ExternalResourceTargetIntegrity",
      "integrity": "sha256-+M3dMZXeSIwAP8BsIAwxn5ofFWUtaoSoDfB+/J8uXMo="
    }
  ]
}