The Bitmark property system is an universal property system for conferring the same property rights to digital assets that have long existed for physical assets. This system records ownership claims for digital assets as digital property titles known as bitmark certificates on the Bitmark public blockchain. A digital asset can be any digital object, including files, applications, code, and data. In the digital world:

digital property = digital asset + bitmark certificate (property rights)

For simplicity, bitmark certificate is shorten as bitmark in SDK design.

You can work with the Bitmark blockchain to look up Bitmark certificates or even register and transfer digital properties using the Bitmark SDK, a collection of libraries for different programming languages and mobile platforms. In addition to providing language-specific bindings to the Bitmark APIs, the SDK also simplifies local key management for signing and encryption.

Getting Started


  • npm install bitmark-sdk-js
  • pod 'BitmarkSDK'
  • // From your build.gradle
    repositories {
        maven { url 'https://oss.sonatype.org/content/repositories/snapshots/' } // For snapshot version
    dependencies {
        implementation 'com.bitmark.sdk:java-sdk:2.1.0' // Java SDK
        // Or
        implementation 'com.bitmark.sdk:android-sdk:2.1.0' // Android SDK
  • go get github.com/bitmark-inc/bitmark-sdk-go

Get your API token

The API token is required to authenticate your requests to the Bitmark API.

Please contact our support to create your developer account and get the API token.


Before working with the Bitmark blockchain, you’ll need to configure the SDK for your API token and the Bitmark network that you’ll be using.

Every code example in other sections presumes the SDK is already correctly initialized.

  • const sdk = require('bitmark-sdk-js');
    const config = {
      apiToken: "api-token",
      network: "testnet"
  • import BitmarkSDK
    BitmarkSDK.initialize(config: SDKConfig(apiToken: "api-token",
                                            network: .testnet,
                                            urlSession: URLSession.shared))
  • final GlobalConfiguration.Builder builder = GlobalConfiguration.builder().withApiToken("api-token").withNetwork(Network.LIVE_NET);
  • import sdk "github.com/bitmark/bitmark-inc/bitmark-sdk-go"
    func main() {
    	config := &sdk.Config{
    		APIToken: "YOUR API TOKEN",
    		Network:  sdk.Testnet,
    		HTTPClient: &http.Client{
    			Timeout: 10 * time.Second,