Hello,
if you don’t see your security record in Blogger settings, please try this (old webmaster tools page):
 
copy and open this link: https://www.google.com/webmasters/verification/details?hl=en&domain=weblove.pl
 
but replace weblove.pl with your custom domain -> then DNS CNAME record -> click on “Details”.
 
OR If you are redirected to the homepage, click on “add a property” -> select Alternate methods -> Domain name provider -> Other -> click on “Add a CNAME record” -> you will get CNAME host and target.
 
Add this to your DNS zone.
 
Important note: You must be logged in with the same google account you use on Blogger.
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you also need to add a second CNAME record (ghs) and 4 A-records (Google IPs): https://support.google.com/blogger/answer/1233387 (step 2 and 3) + remove all unnecessary A-records with other IP addresses.