45+ Man Seeking Help: Complex Family History, Inheritance, and Document Issues

I have a unique life story. When I was four months old, I was adopted by my relatives. As a result, all my official documents, including certificates, list my adoptive parents. Currently I am 45+. Both of my adoptive parents have passed away 15-20 years ago. I have nothing from my adoptive family. Later in life, when I was 15, I reconnected with my biological parents, but I didn't initially consider them as my parents. Unfortunately, my biological father passed away few years back. I have siblings from my biological parents, but I can't claim any inheritance from them due to a lack of proof of paternity. Other hand, I was the only one to assist my biological father financially, helping with my sister's marriage and property purchases. However, those properties are in my biological parents' names. Due to my complex situation, I've been unable to obtain essential documents from govt like a residential certificate and my child's caste certificate. I'm seeking advice on how to address this issue to ensure a smooth future for my child. My life was completely disrupted by the lack of care from both my adoptive and biological families at early stage. Over time, I've built a successful career by myself. Currently I have a teenage daughter. I have purchased properties like lands and flats. All of these properties are either in my wife's name or jointly owned by us. I'm requesting legal guidance on how to address this situation so that my child and me will not face any difficulties in the future.