CloudFlare 发布了证书透明度监控服务 - 可以在 Dashboard 的 Crypto tab 里面设置启用；你将会在 CA 为你的域名签发 SSL 证书的时候收到通知
https://blog.cloudflare.com/introducing-certificate-transparency-monitoring/
https://blog.cloudflare.com/introducing-certificate-transparency-monitoring/
Cloudflare Blog
Introducing Certificate Transparency Monitoring
With CT Monitoring, we’ll send you an email whenever a certificate is issued for one of your domains.