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?

  • The best resource to find this out would probably be Coinbase's user manual, but perhaps someone here is familiar enough with the service's offering to be able to tell you.
    – Murch
    Mar 20, 2021 at 16:56

1 Answer 1


I would start with looking at the alfanumeric number. Is it in hexadecimal? If yes , is it 32 bytes long --> random number Is it a code that begins with a 5 or L or K --> Private key

Never share any of these. But you can calculate the Public key and the Bitcoin address from those.

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