There's two types of verification. First, most people do a selfie with a sign of their username and date to prove they're a real person. But if you're planning to stay anonymous, which is perfectly fine, that doesn't really help much. Just bear in mind, this is not compulsory, just nice to do in case people think you're a bot or someone who creates a lot of accounts to spam Hive. If you write sincerely, people can tell if you're real or not - 99% of the time.
The other type of verification is when you plan to cross post content from other social media or platforms like Medium or YouTube. In order to prove that you own the content there, you can add you Hive link to those account profile.
There's a lot of posts about Hive because there's quite a lot going on, but it's very difficult to find them. That's why I created @newbies-guide to consolidate useful post to save people looking up and down. My suggestion is to follow the account and check out the content there whenever you have time.
If you have any further questions, don't hesitate to drop me a message, or ask people.