Unable to Verify FreeDNS Shared Subdomain – Parent Domain TXT Verification Required - Help

Title: Unable to verify a FreeDNS public shared subdomain on Vercel

Hello Vercel Team,

I'm deploying a school competition website called Clash of Cendekia and would like to use the custom domain clashofcendekia.dicionar.io.

The domain dicionar.io is listed as Public in FreeDNS (afraid.org), meaning users are allowed to create subdomains.

I successfully created the following DNS record:

Domain: clashofcendekia.dicionar.io
Type: A
Value: 76.76.21.21
DNS Provider: FreeDNS (afraid.org)

However, Vercel displays Verification Required and says that the domain is linked to another Vercel account.

Vercel requests a TXT verification record at _vercel.dicionar.io, which is part of the shared parent domain and is outside my ownership.

I only control my assigned subdomain.

My question:

Is there a supported way to verify ownership or control of clashofcendekia.dicionar.io independently, such as using a TXT record under my specific subdomain, without requiring access to the parent domain?

I would like to keep using Vercel and this exact custom hostname.

Could you please advise on a supported verification method?

Thank you!