wygk

Places a Copyright Safeguard notice in the site’s footer, or in the page content (using a shortcode). The notice can be a button or a simple text link. Clicking the notice causes a small pop-up window to appear with information about the site’s copyright protection. Using this plugin requires the user to sign up for a free account on the Copyright Safeguard website, where the site’s copyright information is stored.

Copyright Safeguard Footer Notice

Add a Copyright Safeguard notice in the site footer, or as a shortcode.   Clicking the notice opens a small pop-up window with information about copyr …

funfunkan

It is a plug-in that automatically creates copyright notation on the website. 
When the New Year comes, you can change the copyright renewal year automatically and display it.
The set copyright notation is pasted to the site theme footer etc. with a short code.
Webサイトに著作権表記を自動で作成してくれるプラグインです。 
新年が来たら自動で著作権更新年を変更して表示できます。
設定した著作権表記はショートコードでサイトテーマフッターなどに貼り付けるだけです。

stfCopyright

著作権ジェネレータープラグイン（Copyrights generator plugin）

Copyright Safeguard Footer Notice vs stfCopyright