I feel like we should add a `parentBeaconBlockRoot` field to the "block" schema: https://github.com/ethereum/execution-apis/blob/9c873c21d7d773d0df4b679b0bb37bf05aebadf2/src/schemas/block.yaml#L24 I'm definitely open to another name, but that's the name used in the Engine API: https://github.com/ethereum/execution-apis/pull/420