Add example of USMCACertificateOfOrigin

[nissimsan]

{
  "id": "http://example.org/credentials/",
  "type": [
    "VerifiableCredential"
  ],
  "issuanceDate": "2021-02-04T20:29:37+00:00",
  "issuer": "did:key:z6MktHQo3fRRohk44dsbE76CuiTpBmyMWq2VVjvV6aBSeE3U",
  "credentialSubject": {
    "type": "USMCACertificateOfOrigin",
    "certifier": "Importer",
    "exporterDetails": {
      "type": "Organization",
      "name": "Torphy, Fahey and Stamm",
      "description": "Synergized composite data-warehouse",
      "address": {
        "type": "PostalAddress",
        "streetAddress": "8062 Arvel Roads",
        "addressLocality": "Bennieside",
        "addressRegion": "Connecticut",
        "postalCode": "98547",
        "addressCountry": "Virgin Islands, U.S."
      },
      "email": "Constance83@example.com",
      "phoneNumber": "555-203-9638",
      "faxNumber": "555-934-3962"
    },
    "importerDetails": [
      {
        "type": "Organization",
        "name": "Bashirian, Jakubowski and Wolff",
        "description": "Assimilated 24 hour toolset",
        "address": {
          "type": "PostalAddress",
          "streetAddress": "01551 Keebler Knoll",
          "addressLocality": "Vivianeburgh",
          "addressRegion": "Oregon",
          "postalCode": "47090",
          "addressCountry": "Bhutan"
        },
        "email": "Woodrow_Hackett@example.net",
        "phoneNumber": "555-716-2400",
        "faxNumber": "555-853-9640"
      }
    ],
    "producerDetails": [
      {
        "type": "Organization",
        "name": "Terry Inc",
        "description": "Optimized discrete core",
        "address": {
          "type": "PostalAddress",
          "streetAddress": "47568 Elenora Station",
          "addressLocality": "South Angel",
          "addressRegion": "North Dakota",
          "postalCode": "05346-3259",
          "addressCountry": "Greenland"
        },
        "email": "Rowland.Rolfson@example.net",
        "phoneNumber": "555-127-7813",
        "faxNumber": "555-962-5895"
      }
    ],
    "goods": [
      {
        "type": "UsmcaProductSpecifier",
        "product": {
          "type": [
            "Product"
          ],
          "sku": "323050346937",
          "description": "Non-alloy steel rolls",
          "commodity": {
            "type": [
              "Commodity"
            ],
            "commodityCode": "721320",
            "commodityCodeType": "HS",
            "description": "Steel Coils"
          }
        },
        "originCriterion": "A",
        "countryOfOrigin": "MX"
      }
    ],
    "blanketPeriodFrom": "2021-06-22",
    "blanketPeriodTo": "2022-06-21"
  },
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://w3id.org/traceability/v1"
  ],
  "proof": {
    "type": "Ed25519Signature2018",
    "created": "2019-12-11T03:50:55Z",
    "jws": "eyJhbGciOiJFZERTQSIsImI2NCI6ZmFsc2UsImNyaXQiOlsiYjY0Il19..NozydVb84fBPeORyUgBUPTsV_W6jdSoH5_9J5xwaeThsF9Gd11xa52eg4n1Z8t6LlaecFy6fLVPkbn-3mPiICg",
    "proofPurpose": "assertionMethod",
    "verificationMethod": "did:key:z6MktHQo3fRRohk44dsbE76CuiTpBmyMWq2VVjvV6aBSeE3U#z6MktHQo3fRRohk44dsbE76CuiTpBmyMWq2VVjvV6aBSeE3U"
  }
}

[nissimsan]

https://github.com/w3c-ccg/traceability-vocab/pull/264

[OR13]

We did it.