=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Server: nginx
Date: Sat, 04 Dec 2021 04:20:14 GMT
Content-Type: text/html; charset=iso-8859-1
Connection: close
Location: https://seopro.jp/grc/

HTTP/1.1 200 OK
Server: nginx
Date: Sat, 04 Dec 2021 04:20:14 GMT
Content-Type: text/html
Content-Length: 14424
Connection: close
Last-Modified: Wed, 14 Apr 2021 05:26:51 GMT
ETag: &quot;3858-5bfe7fe753cc0&quot;
Accept-Ranges: bytes

Request headers
================
HEAD /grc/ HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: seopro.jp
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.