did document:
  public key:
    id: did:btcr:xxcl-lzpq-q83a-0d5#key-0
    type: EcdsaSecp256k1VerificationKey2019
  public key:
    type: EcdsaSecp256k1VerificationKey2019
    public key jwk:
      crv: secp256k1
      kty: EC
  public key:
    type: GpgVerificationKey2020
    controller: did:btcr:xxcl-lzpq-q83a-0d5
    public key gpg: -----BEGIN PGP PUBLIC KEY BLOCK----- [binary] =1LBV -----END PGP PUBLIC KEY BLOCK-----
  authentication:
    public key: did:btcr:xxcl-lzpq-q83a-0d5#key-0