Data model

Process for creating a trust chain

1. Create did:cheqd DID for Root TAO

2. Establish root of trust, by:

   1. Associating Root TAO DID with X.509 certificate; or

   2. Associating Root TAO DID with cheqd Validator

3. Create did:cheqd DIDs for TAOs or TIs within the ecosystem

4. Create body of Verifiable Accreditation, specifying:

   1. The did:cheqd DID of the subject organisation that the Accreditation is being issued to

   2. A UUID as a reservedAttributeId which aligns with the resourceId of the DID-Linked Resource

5. Encode Verifiable Accreditation as a hexidecimal and as a base64 encoded value

6. Compile payload file for writing Verifiable Accreditation as a DID-Linked Resource

7. Publish transaction as a DID-Linked Resource, using the same UUID for the resourceId as the value specified in the reservedAttributeId

Resource Payload File fields

Field	Description	Required
did	DID of the DID Controller publishing the DID-Linked Resource	Yes
hash	Hash of the Verifiable Accreditation as a Base64 encoded value	Yes
body	Body of the Verifiable Accreditation as a hexidecimal string	Yes
type	Type of Resource being created, defaults to VerifiableAccreditation	Yes
issuerType	Type of Issuer that is issuing this Verifiable Accreditation, can be: "RootTAO", "TAO" or "SubTAO"	Yes
tao	DID of the TAO that accredited the Issuer	Yes
rootTao	DID of the root of trust that accredited the TAO and the issuer	Yes
revoked	Boolean value indicating whether the Verifiable Accreditation is revoked or not	Yes
Encrypted	Boolean value indicating whether the Verifiable Accreditation is encrypted or not	No

Example payload file

```json
{
  "attribute": {
    "did": "did:cheqd:testnet:098c4f66-b461-4037-9cf0-c5db75b270c6",
    "hash": "bcdb6bc952c8c897ca1e605fce25f82604c76c16d479770014b7b262b93c0250",
    "body": "eyJhbGciOiJFUzI1NiIsInR5cCI6IkpXVCIsImtpZCI6ImRpZDplYnNpOnpqSFpqSjRTeTdyOTJCeFh6RkdzN3FEI1Q2aVBNVy1rOE80dXdaaWQyOUd3TGUtTmpnNDBFNmpOVDdoZExwSjNaU2cifQ.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.o6olFmrYFpWy36N2Jnz1DHKBkAcSt3vN7RzSU-j6HGyhzHVZAEG7W20EtZDw4LVvKE0GzH9burBAdfJkAWR_6w",
  },
  "metadata": {
    "type": "VerifiableAccreditation",
    "issuerType": "RootTAO",
    "tao": "did:cheqd:testnet:098c4f66-b461-4037-9cf0-c5db75b270c6",
    "rootTao": "did:cheqd:testnet:098c4f66-b461-4037-9cf0-c5db75b270c6",
    "revoked": false,
    "encrypted": false
  }
}
```