Don't get me wrong.. I am not even sure if you may well not have had already done as much work (and looking) into the source/recipients of the bitcoin transactions as you are reasonably able to accomplish... even though it seems to me that many times it is much better for members to error on the side of doing more research and work into matters
I did searched and checked transaction history, because I found some big transactions that I did not know what were exchanged with those bitcoins, I created this topic.
I did not add those transaction hashes in OP because I was lazy. When I searched it with blockchair.com explorer, it gives limited number of transactions each page, I clicked to expand that page but I lost all when enter F5. It is my mistake but I found something I wanted and did not come back.
You are right that I should include it in OP when I created the topic.