I know it was mine because I contacted the brand to check if Amazon had bought from them. They hadn't. Also, I was the only one selling this item on Amazon so they couldn't have stolen from someone else. What's more, I was the only one importing it to the US. I know because I'm acquainted with the brand owners.
When I finally managed to get my stuff out of their warehouses, which took almost a year, they admitted that some of the inventory had been "lost" and compensated me pennies on the dollar.
It was a surreal, Kafkaesque, experience that still brings back painful memories. I avoid thinking about it but I hope that one day Amazon will crash, burn, and hopefully never recover.