Dream on.
Someone already posted the fact that it was “layered” or digitally altered from the original.
Photoshop layering? LOL!
Photoshop uses layers only during the image editing process. When you create a finished image from a Photoshop document, it lays down the layers on top of each other in sequence. There are no layers in the finished image. You cannot recover the layers from the finished image. To see the layers, you need the original Photoshop document file the digital artist used, not the JPEG (or whatever) that it was used to create.
Photoshop uses layers only during the image editing process.
Not exactly true, you can by mistake or design save a layered image intact for further processing of each individual layer. I do it regularly.
Knowing nothing of forensics, but having extensive experience of family history and certificates, I took the usual route.
First established fact is that David Jeffrey Bomford exists and lives in Southern Australia. He is middle-aged. Next he has Alaric Robert Hubert Bomford as a father. His mother (now deceased) was Doreen Betty Bomford (formerly Loxton. She is 31 years at his birth in 1959.
The records at her interment in 2002, state her husband is "Al" Bomford and among her children is David. These are records held at Houghton cementery, in Australia.
My reasoning (sans forensics) is this. Since we have a live David Jeffrey Bomford of Australia; at his birth, just what would the registrar have entered- other than the certificate we have seen?