Which site verification method provides definitive proof of domain ownership when all other methods fail?

The DNS record verification method provides definitive proof of domain ownership. DNS, or Domain Name System, is essentially the internet's phonebook, translating domain names into IP addresses. When you use DNS record verification, Google provides a unique TXT record, which is a type of DNS record that can hold text information. You then add this TXT record to your domain's DNS settings through your domain registrar (like GoDaddy or Namecheap). By successfully adding this record, you demonstrate that you have administrative control over the domain's DNS zone, proving ownership beyond any doubt. Other methods, such as HTML file upload or HTML tag verification, can be compromised if someone gains access to your website's files or can inject code. Verification via Google Analytics or Tag Manager relies on the existing connection between those services and the website, which might not be definitive proof of domain ownership itself, but rather a delegation of permissions based on a verified user in those platforms. Changing DNS records requires access to the core domain settings, making it the most secure and reliable method.