So does that mean that for a AA to BA connection with baggage, and on two different PNR, and if you bags are checked to your final destination, and if you don't show baggage receipts to BA, that means the bags don't arrive to your final destination?

I am asking this because I had an above scenario over March this year, and it was lost... well, It arrived 6 months late, but damaged and empty. Is it because BA offloaded my bags because I didn't show them the receipts?