Is the secret seed number also the private number? I purchased a bitcoin in 2014 from Coinbase. I received a long alphanumeric number. No private code or seed phrase. I received a 16-digit secret seed at a later date. Is the secret seed I received a replacement for the seed phrase or private number that I can use to access my bitcoins on Coinbase?
I would start with looking at the alfanumeric number.
Is it in hexadecimal? If yes , is it 32 bytes long --&gt; random number
Is it a code that begins with a 5 or L or K --&gt; Private key
Never share any of these.
But you can calculate the Public key and the Bitcoin address from those.