You can now use this plugin to increase your SEO! The GHTime service now provides a link back to your blog whenever a new code is created. Since all the GHTime codes are indexed with Google, this will provide crucial backlinks to your site which will increase your rankings on Google and other search engines. 
This plugin is essential for anyone wishing to protect their intellectual property. 
The Wp to GHTime plugin allows you to protect your intellectual property by using a <a href="http://www.ghti.me" rel="nofollow ugc">GHTime</a> Data Protector Code to timestamp each post for you. The GHTime code is displayed at the bottom of each post and can be verified by clicking on the code. 
Each code is unique and provides proof that the information contained in each of your blog posts belongs to you.

WP to GHTime

Increases your SEO and Google rankings by providing links back to your blog. Protects your intellectual property by using a GHTime Data Protector Code …

Farhad Sakhaei

ParsMizban

DediData

This plugin optimizes WordPress for better ranking in Google and other Search Engines 
* Add post excerpt as Meta Description 
Validated by: 
https://wpreadme.com/ 
https://wordpress.org/plugins/developers/readme-validator

Smart SEO

Smart SEO - WordPress Search Engine Optimization Tools

WP to GHTime vs Smart SEO