Here for comparison is the MFOS wall wart supply
Not the same but kind of similar.
On the stripboard the diodes seem connected differently than your schematic. D3 is from pin 1 to pin 3 on the L7812 for instance.
Once the diodes are corrected, at a glance I think it’s basically the same as the MFOS circuit. The latter has load resistors added:
The load resistors were added as a convenience for testing without a load and are not necessary. The negative regulator needs a slight load to begin regulating which is normally provided by the circuit being powered. These resistors provide a small load so the output voltage can be observed prior to connecting the supply to your circuit.