Podman cannot write signature to http sigstore

Question

Basically, I'm trying to push a signed podman image to the registry, and store the signature on the same server. That way when somebody tries to pull the image they can verify the signature from the registry to make sure it is correct. Pushing and signing are both working fine, but for some reason it's only writing the signature to my local sigstore-staging directory instead of my sigstore, which is the server. If I remove the sigstore-staging option (basically forcing it to look at the server) I get the error Writing directly to a http sigstore <PATH> is not supported. Configure a sigstore-staging: location.

I'm very confused, because storing the signatures on a remote server seems like the entire point of signing images - having a local signature doesn't really help other users who might try to pull. Am I supposed to manually add all of the signature files to the server?