Comment by plagiarist

I learned about a cryptographic interaction that can support that recently (and have spent a lot of time focusing on the idea as a means of procrastination).

I don't use Kagi but the context was their Privacy Pass thingie https://blog.kagi.com/kagi-privacy-pass

It works similarly to what you'd like: they sign sealed tokens you provide. Later, you can unseal a token and use it without invalidating the signature. It is mathematically too difficult for a classical computer to link the sealed and unsealed token.