static boolean isRegisteredName(String name) {
    return name.equals(CLAIM_ISSUER)
        || name.equals(CLAIM_SUBJECT)
        || name.equals(CLAIM_AUDIENCE)
        || name.equals(CLAIM_EXPIRATION)
        || name.equals(CLAIM_NOT_BEFORE)
        || name.equals(CLAIM_ISSUED_AT)
        || name.equals(CLAIM_JWT_ID);
  }
Supported protected headers, as described in https://tools.ietf.org/html/rfc7515#section-4.1
java_src/src/main/java/com/google/crypto/tink/jwt/JwtNames.java