If check on the bottom page of the PIN form, you may see notification that you should send Adsense your ID card soft copy. I sent it, and within hours, Adsense appears on my blog.
Here its email from Adsense team tell me that my address is now verified:
Thank you for sending your proof of identity.
I'm happy to let you know that this fulfills the address verification
requirement for AdSense. You no longer need to enter a PIN.
The Google AdSense Team
I hope this sharing would help other Adsense publisher :).