Issue Verifiable Accreditation

Issue Verifiable Accreditations as DID-Linked Resources

Users are able to issue Verifiable Accreditations as DID-Linked Resources on-ledger, which may be used to verify whether a particular recipient of an accreditation is accredited to issue a certain type of credential, under the scope of a particular governance framework. This implementation on cheqd builds on the principles of the EBSI Trust Chain model, using DID-Linked Resources to create a more standardised format for storing, retrieving and dereferencing to trust registry entries.

Step 1: Set up your account

Make sure you have set up your account with cheqd Studio and are logged in, using our guide below:

Set up your account

Set up your account with cheqd Studio and log in to start using the APIs.

Step 2: Create a DID

Before you can create a Verifiable Accreditation, you need to create a DID which is used to link to one or multiple Verifiable Accreditations on-ledger. Use the API in the page below to create a DID:

Create an Issuer DID

Create a W3C conformant DID on cheqd using the did:cheqd DID Method.

Step 3: Choose the type of Accreditation

Verifiable Accreditations are JSON objects that take the form of the Verifiable Credential data model. There are three types of Verifiable Accreditation:

Type	Description
Verifiable Authorisation for Trust Chain	This Accreditation authorises the recipient to issue Accreditations with reference to a particular governance framework.
Verifiable Accreditation to Accredit	This Accreditation verifies that an organisation has the permissions needed to accredit other organisations for issuing a particular type of Verifiable Accredittion.
Verifiable Accreditation to Attest	This Accreditation verifies that an organisation has the permissions needed to issue Verifiable Credentials, defined by a particular schema.

Step 4: Compile the appropriate request format for the API

For each accreditation type, the user will need to use a different request format for the API.

Verifiable Authorisation for Trust Chain

Request format for Verifiable Authorisation for Trust Chain

{
  "issuerDid": "did:cheqd:testnet:b003df6f-ec8e-48dd-9a2b-7011c5cf0a5e",
  "subjectDid": "did:cheqd:testnet:6af412d7-2f04-4e12-a424-e6719db487ad",
  "schemas": [
    {
      "type": "MuseumPassCredential",
      "url": "https://resolver.cheqd.net/1.0/identifiers/did:cheqd:testnet:0a5b94d0-a417-48ed-a6f5-4abc9e95888d?resourceName=MuseumPassCredentialSchema&resourceType=JsonSchemaValidator2018"
    }
  ],
  "format": "jwt",
  "accreditationName": "authoriseAccreditationTest",
  "trustFramework": "https://learn.cheqd.io/governance/start",
  "trustFrameworkId": "cheqd Governance Framework"
}

Response format for Verifiable Authorisation for Trust Chain

{
  "@context": [
    "https://www.w3.org/2018/credentials/v1"
  ],
  "type": [
    "VerifiableCredential",
    "VerifiableAuthorisationForTrustChain"
  ],
  "issuer": {
    "id": "did:cheqd:testnet:b003df6f-ec8e-48dd-9a2b-7011c5cf0a5e"
  },
  "credentialSubject": {
    "accreditedFor": [
      {
        "schemaId": "https://resolver.cheqd.net/1.0/identifiers/did:cheqd:testnet:0a5b94d0-a417-48ed-a6f5-4abc9e95888d?resourceName=MuseumPassCredentialSchema&resourceType=JsonSchemaValidator2018",
        "type": "MuseumPassCredential"
      }
    ],
    "id": "did:cheqd:testnet:6af412d7-2f04-4e12-a424-e6719db487ad"
  },
  "issuanceDate": "2024-10-15T04:06:47.000Z",
  "termsOfUse": {
    "type": "VerifiableAuthorisationForTrustChain",
    "trustFramework": "https://learn.cheqd.io/governance/start",
    "trustFrameworkId": "cheqd Governance Framework"
  },
  "proof": {
    "type": "JwtProof2020",
    "jwt": "eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.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.6dKE9-y2Id852onu1_WnD6aJnDtxgFZcjCbCfQ8MT1ACsHY8ox5jiKP4QUJNmhwesLidC99Qa0uyCrUhvHc2Bg"
  }
}

Request Parameter	Required	Description
"issuerDid"	Yes	The DID of the Issuer of the Accreditation
"subjectDid"	Yes	The DID of the Recipient of the Accreditation
"schemas"	Yes	A schema or multiple schemas that the recipient is accredited to issue
"format"	Optional	Defaults to "jwt" but may also be "json-ld"
"accreditationName"	Yes	Name of the accreditation which is used for chronological versioning of the accreditation.
"trustFramework"	Yes	A URL that points to an Ecosystem Governance Framework
"trustFrameworkId"	Yes	The name of the Ecosystem Governance Framework
"credentialStatus"	Optional	An object detailing the status information of the Accreditation

Verifiable Accreditation to Accredit

Request format for Verifiable Accreditation to Accredit

{
  "issuerDid": "did:cheqd:testnet:b003df6f-ec8e-48dd-9a2b-7011c5cf0a5e",
  "subjectDid": "did:cheqd:testnet:6af412d7-2f04-4e12-a424-e6719db487ad",
  "schemas": [
    {
      "type": "MuseumPassCredential",
      "url": "https://resolver.cheqd.net/1.0/identifiers/did:cheqd:testnet:0a5b94d0-a417-48ed-a6f5-4abc9e95888d?resourceName=MuseumPassCredentialSchema&resourceType=JsonSchemaValidator2018"
    }
  ],
  "format": "jwt",
  "accreditationName": "accreditationToAttestTest",
  "parentAccreditation": "did:cheqd:testnet:15b74787-6e48-4fd5-8020-eab24e990578?resourceName=accreditAccreditation&resourceType=VerifiableAccreditationToAccredit",
  "rootAuthorization": "did:cheqd:testnet:5RpEg66jhhbmASWPXJRWrA?resourceName=authorizeAccreditation&resourceType=VerifiableAuthorisationForTrustChain",
}

Response format for Verifiable Accreditation to Accredit

{
  "@context": [
    "https://www.w3.org/2018/credentials/v1"
  ],
  "type": [
    "VerifiableCredential",
    "VerifiableAccreditationToAccredit"
  ],
  "issuer": {
    "id": "did:cheqd:testnet:b003df6f-ec8e-48dd-9a2b-7011c5cf0a5e"
  },
  "credentialSubject": {
    "accreditedFor": [
      {
        "schemaId": "https://resolver.cheqd.net/1.0/identifiers/did:cheqd:testnet:0a5b94d0-a417-48ed-a6f5-4abc9e95888d?resourceName=MuseumPassCredentialSchema&resourceType=JsonSchemaValidator2018",
        "type": "MuseumPassCredential"
      }
    ],
    "id": "did:cheqd:testnet:6af412d7-2f04-4e12-a424-e6719db487ad"
  },
  "issuanceDate": "2024-10-15T04:06:47.000Z",
  "termsOfUse": {
    "type": "VerifiableAuthorisationForTrustChain",
    "parentAccreditation": "did:cheqd:testnet:15b74787-6e48-4fd5-8020-eab24e990578?resourceName=accreditAccreditation&resourceType=VerifiableAccreditationToAccredit",
    "rootAuthorization": "did:cheqd:testnet:5RpEg66jhhbmASWPXJRWrA?resourceName=authorizeAccreditation&resourceType=VerifiableAuthorisationForTrustChain",
  },
  "proof": {
    "type": "JwtProof2020",
    "jwt": "eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.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.6dKE9-y2Id852onu1_WnD6aJnDtxgFZcjCbCfQ8MT1ACsHY8ox5jiKP4QUJNmhwesLidC99Qa0uyCrUhvHc2Bg"
  }
}

Request Parameter	Required	Description
"issuerDid"	Yes	The DID of the Issuer of the Accreditation
"subjectDid"	Yes	The DID of the Recipient of the Accreditation
"schemas"	Yes	A schema or multiple schemas that the recipient is accredited to issue
"format"	Optional	Defaults to "jwt" but may also be "json-ld"
"accreditationName"	Yes	Name of the accreditation which is used for chronological versioning of the accreditation.
"parentAccreditation"	Yes	A URL or DID URL of Accreditation of the Issuer demonstrating capacity to issue this Accreditation.
"rootAuthorization"	Yes	A URL or DID URL of the root authorization governing the ecosystem
"credentialStatus"	Optional	An object detailing the status information of the Accreditation

For a trusted ecosystem, these attestations are required to trace the legitimacy of a credential issuer to a root-of-trust.

Verifiable Accreditation to Attest

Request format for Verifiable Accreditation to Attest

{
  "issuerDid": "did:cheqd:testnet:b003df6f-ec8e-48dd-9a2b-7011c5cf0a5e",
  "subjectDid": "did:cheqd:testnet:6af412d7-2f04-4e12-a424-e6719db487ad",
  "schemas": [
    {
      "type": "MuseumPassCredential",
      "url": "https://resolver.cheqd.net/1.0/identifiers/did:cheqd:testnet:0a5b94d0-a417-48ed-a6f5-4abc9e95888d?resourceName=MuseumPassCredentialSchema&resourceType=JsonSchemaValidator2018"
    }
  ],
  "format": "jwt",
  "accreditationName": "accreditationToAttestTest",
  "parentAccreditation": "did:cheqd:testnet:15b74787-6e48-4fd5-8020-eab24e990578?resourceName=accreditAccreditation&resourceType=VerifiableAccreditationToAccredit",
  "rootAuthorization": "did:cheqd:testnet:5RpEg66jhhbmASWPXJRWrA?resourceName=authorizeAccreditation&resourceType=VerifiableAuthorisationForTrustChain",
}

Response format for Verifiable Accreditation to Attest

{
  "@context": [
    "https://www.w3.org/2018/credentials/v1"
  ],
  "type": [
    "VerifiableCredential",
    "VerifiableAccreditationToAccredit"
  ],
  "issuer": {
    "id": "did:cheqd:testnet:b003df6f-ec8e-48dd-9a2b-7011c5cf0a5e"
  },
  "credentialSubject": {
    "accreditedFor": [
      {
        "schemaId": "https://resolver.cheqd.net/1.0/identifiers/did:cheqd:testnet:0a5b94d0-a417-48ed-a6f5-4abc9e95888d?resourceName=MuseumPassCredentialSchema&resourceType=JsonSchemaValidator2018",
        "type": "MuseumPassCredential"
      }
    ],
    "id": "did:cheqd:testnet:6af412d7-2f04-4e12-a424-e6719db487ad"
  },
  "issuanceDate": "2024-10-15T04:06:47.000Z",
  "termsOfUse": {
    "type": "VerifiableAuthorisationForTrustChain",
    "parentAccreditation": "did:cheqd:testnet:15b74787-6e48-4fd5-8020-eab24e990578?resourceName=accreditAccreditation&resourceType=VerifiableAccreditationToAccredit",
    "rootAuthorization": "did:cheqd:testnet:5RpEg66jhhbmASWPXJRWrA?resourceName=authorizeAccreditation&resourceType=VerifiableAuthorisationForTrustChain",
  },
  "proof": {
    "type": "JwtProof2020",
    "jwt": "eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.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.6dKE9-y2Id852onu1_WnD6aJnDtxgFZcjCbCfQ8MT1ACsHY8ox5jiKP4QUJNmhwesLidC99Qa0uyCrUhvHc2Bg"
  }
}

Request Parameter	Required	Description
"issuerDid"	Yes	The DID of the Issuer of the Accreditation
"subjectDid"	Yes	The DID of the Recipient of the Accreditation
"schemas"	Yes	A schema or multiple schemas that the recipient is accredited to issue
"format"	Optional	Defaults to "jwt" but may also be "json-ld"
"accreditationName"	Yes	Name of the accreditation which is used for chronological versioning of the accreditation.
"parentAccreditation"	Yes	A URL or DID URL of Accreditation of the Issuer demonstrating capacity to issue this Accreditation.
"rootAuthorization"	Yes	A URL or DID URL of the root authorization governing the ecosystem
"credentialStatus"	Optional	An object detailing the status information of the Accreditation

For a trusted ecosystem, these attestations are required to trace the legitimacy of a credential issuer to a root-of-trust.

Step 5: Make request to the API

Publish a verifiable accreditation for a DID.

Generate and publish a Verifiable Accreditation for a subject DID as a DID Linked resource.

post

/trust-registry/accreditation/issue

Authorizations

Query parameters

accreditationTypestring · enumrequired

Select the type of accreditation to be issued.

Options: authorise, accredit, attest

Body

application/x-www-form-urlencodedapplication/json

issuerDidstringrequired

DID of the Verifiable Accreditation issuer. This needs to be a did:cheqd DID.

Example: did:cheqd:testnet:7bf81a20-633c-4cc7-bc4a-5a45801005e0

subjectDidstringrequired

DID of the Verifiable Accreditation holder/subject. This needs to be a did:cheqd DID.

Example: did:cheqd:testnet:z6MkhaXgBZDvotDkL5257faiztiGiC2QtKLGpbnnEGta2doK

accreditationNamestringrequired

Unique name of the Verifiable Accreditation.

attributesobject

JSON object containing the attributes to be included in the Accreditation.

parentAccreditationstring

DID URL of the parent Verifiable Accreditation, required for accredit/attest operation.

rootAuthorisationstring

DID URL of the root Verifiable Accreditation, required for accredit/attest operation.

trustFrameworkstring

Name or Type of the Trust Framework, required for authorise operation.

trustFrameworkIdstring

Url of the Trust Framework, required for authorise operation.

expirationDatestring · date-time

Optional expiration date according to the <a href=https://www.w3.org/TR/vc-data-model/#expiration> VC Data Model specification</a>.

Example: 2023-06-08T13:49:28.000Z

formatstring · enum

Format of the Verifiable Accreditation. Defaults to VC-JWT.

Example: jwt

Options: jwt, jsonld

schemasobject[]required

@contextstring[]

Example: ["https://schema.org/schema.jsonld","https://veramo.io/contexts/profile/v1"]

typestring[]

Example: ["Person"]

refreshServiceobject[]

credentialStatusobject

Optional credentialStatus properties for VC revocation or suspension. Takes statusListName and statusListPurpose as inputs.

Example: {"statusPurpose":"revocation","statusListName":"employee-credentials"}

evidenceobject[]

termsOfUseobject[]

Responses

application/json

cURL

JavaScript

Python

HTTP

cURL

curl -L \
  --request POST \
  --url '/trust-registry/accreditation/issue?accreditationType=authorise' \
  --header 'x-api-key: YOUR_API_KEY' \
  --header 'Content-Type: application/x-www-form-urlencoded' \
  --data 'issuerDid=did:cheqd:testnet:7bf81a20-633c-4cc7-bc4a-5a45801005e0&subjectDid=did:cheqd:testnet:2582fe17-9b25-45e4-8104-1cfca430f0c3&format=jwt&accreditationName=authoriseAccreditation&trustFramework=https://learn.cheqd.io/governance/start&trustFrameworkId=cheqd Governance Framework&parentAccreditation=did:cheqd:testnet:15b74787-6e48-4fd5-8020-eab24e990578?resourceName=accreditAccreditation&resourceType=VerifiableAccreditationToAccredit&rootAuthorisation=did:cheqd:testnet:5RpEg66jhhbmASWPXJRWrA?resourceName=authoriseAccreditation&resourceType=VerifiableAuthorisationForTrustChain&credentialStatus=[object Object]&schemas=[object Object]'

200

400

401

500

200

{
  "issuanceDate": "2023-06-08T13:49:28.000Z",
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://schema.org",
    "https://veramo.io/contexts/profile/v1"
  ],
  "type": [
    "VerifiableCredential",
    "Person"
  ],
  "credentialSubject": {
    "gender": "male",
    "id": "did:key:z6MkhaXgBZDvotDkL5257faiztiGiC2QtKLGpbnnEGta2doK",
    "name": "Bob"
  },
  "credentialStatus": {
    "id": "https://resolver.cheqd.net/1.0/identifiers/did:cheqd:testnet:7c2b990c-3d05-4ebf-91af-f4f4d0091d2e?resourceName=cheqd-suspension-1&resourceType=StatusList2021Suspension#20",
    "statusIndex": 20,
    "statusPurpose": "suspension",
    "type": "StatusList2021Entry"
  },
  "issuer": {
    "id": "did:cheqd:testnet:7bf81a20-633c-4cc7-bc4a-5a45801005e0"
  },
  "proof": {
    "jwt": "eyJhbGciOiJFZERTQSIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJkaWQ6Y2hlcWQ6dGVzdG5ldDo3YmY4MWEyMC02MzNjLTRjYzctYmM0YS01YTQ1ODAxMDA1ZTAiLCJuYmYiOjE2ODYyMzIxNjgsInN1YiI6ImRpZDprZXk6ejZNa2hhWGdCWkR2b3REa0w1MjU3ZmFpenRpR2lDMlF0S0xHcGJubkVHdGEyZG9LIiwidmMiOnsiQGNvbnRleHQiOlsiaHR0cHM6Ly93d3cudzMub3JnLzIwMTgvY3JlZGVudGlhbHMvdjEiLCJodHRwczovL3NjaGVtYS5vcmciLCJodHRwczovL3ZlcmFtby5pby9jb250ZXh0cy9wcm9maWxlL3YxIl0sImNyZWRlbnRpYWxTdWJqZWN0Ijp7ImdlbmRlciI6Im1hbGUiLCJuYW1lIjoiQm9iIn0sInR5cGUiOlsiVmVyaWZpYWJsZUNyZWRlbnRpYWwiLCJQZXJzb24iXX19.wMfdR6RtyAZA4eoWya5Aw97wwER2Cm5Guk780Xw8H9fA3sfudIJeLRLboqixpTchqSbYeA7KbuCTAnLgXTD_Cg",
    "type": "JwtProof2020"
  }
}

The request was successful.

Step 7: Reference the Verifiable Accreditation

Owing to the design of DID-Linked Resources, following the creation of the a Verifiable Accreditation, users are able to reference the specific version, or create a query to always fetch the latest version of the Accreditation.

Using a DID Resolver or the search DID endpoint, users can find the DID URL and unique resourceId of the Verifiable Accreditation. The unique resourceId allows users to specify this exact version of the Accreditation.

In the DID Document Metadata, users should find "linkedResourceMetadata", like the following snippet:

"linkedResourceMetadata": [
      {
        "resourceURI": "did:cheqd:testnet:0a5b94d0-a417-48ed-a6f5-4abc9e95888d/resources/4e1104f9-2ee9-4bde-adc2-ab8ba72b124a",
        "resourceCollectionId": "0a5b94d0-a417-48ed-a6f5-4abc9e95888d",
        "resourceId": "4e1104f9-2ee9-4bde-adc2-ab8ba72b124a",
        "resourceName": "OxfordUniversityAccreditation",
        "resourceType": "VerifiableAccreditationToAccredit",
        "mediaType": "application/json",
        "resourceVersion": "",
        "created": "2023-03-24T12:13:45Z",
        "checksum": "6819aaecd4073173b159fedf8077c38e14939d03d58e7f4e2a0ddfe034eb2ed4",
        "previousVersionId": null,
        "nextVersionId": null
      } 

Specific version of the Verifiable Accreditation

Here, the "resourceURI" specifies the DID URL of the specific Verifiable Accreditation that was created.

Latest version of the Verifiable Accreditation

In order to reference the latest version of the Verifiable Accreditation, the following construction needs to be used:

did:cheqd:<namespace>:<resourceCollectionId>?resourceName=<resourceName>&resourceType=<resourceType>

For example:

did:cheqd:testnet:0a5b94d0-a417-48ed-a6f5-4abc9e95888d?resourceName=OxfordUniversityAccreditation&resourceType=VerifiableAccreditationToAccredit

Verifiable Accreditation at specific point in time

In order to reference the Verifiable Accreditation at a particular point in time, the following construction needs to be used:

did:cheqd:<namespace>:<resourceCollectionId>?resourceName=<resourceName>&resourceType=<resourceType>&resourceVerionTime=<XMLDateTime>

For example:

did:cheqd:testnet:0a5b94d0-a417-48ed-a6f5-4abc9e95888d?resourceName=OxfordUniversityAccreditation&resourceType=VerifiableAccreditationToAccredit&resourceVersionTime=2023-02-22T06:58:18.61Z