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LM324: How to Verify Authentic IC from TI

Part Number: LM324

Tool/software:

I have received some samples of LM324 SOIC-8 Package from local vender, tested those with our own productionised product, but got different results
So I checked and found old and new one have different Laser Markings and no TI's logo on it.
Im was in doubt that those are clone one but that vender told me that TI have updated the Markings for all new TI products. 
but I cant find any evidence thats why Im here,
can any one confirms, or have any source that condfirms if its true?
Please find attached photo of the samples I have recevied.