Cloudflare powered censorship in Pakistan works in a similar fashion. ISPs block websites, but because Cloudflare's data center forwards using local ISPs, you get a nice secure blocked page.
Posted this[0] months ago, even sent emails to Cloudflare NOC multiple times and nobody did even care.
[0] https://community.cloudflare.com/t/censored-pop-orpheus-not-...
Do these ISPs limit themselves to court-ordered blocks in your case?