Trailhead and Webassessor Linking steps

https://trailhead.salesforce.com/credentials/verification

1.Certification Holders: Check Your Status: Enter your mail id and check the recaptch and click on request

2. you Received the mail display what certification was pending display

3. scroll down below
        Current Trailhead and Webassessor Linking Status:

        Linking Status: not linked

        Linked Trailhead Profile: not linked

       Not Linked?:

       Use this link and your unique verification code (ac37f53), to link your accounts.
4. click on the Link
5. Login Trailhead
6. click in salesforce login Enter your Dev org credentials
7. display the link your trailhead and webassessor accounts
Below enter the unique verification code sent your email: already you received code above email enter the code:ac37f53
8. click on Link account
9.click on Maintain Now