What exactly can we call verifiable compute?

Most signatures/attestations introduce trust over the signers or issuers. PoS relies on honest majority assumptions, even ZK needs some trust setup.

Is there something that can be truly trustless, or are we just minimizing the trust?

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Yes, but the entire concept of Verifiable Credential relies on the trust over credential issuer. How do we then eliminate that trust too?

Verifiable Credentials is W3C spec that dives into this topic. Two key components are authentication and verification.

Photographers must sign through same crypto wallet that ENS, Twitter, (Warpcast, and FC?)  are tied to. 

Sony, Leica, Nikon (among other manufacturers) enabling authentication of recording equipment tied to photographers also

Photographers can authenticate and verify their authorship through Abobe metadata signed through a crypto wallet. The metadata standard connects to the wallet and certain social media accounts. Warpcast might become a verifier in this system.

Reduce fraud through crypto signatures.