Tl;dr: what you might have is
- a seed-phrase for a Bitcoin pockets (the place you take care of your personal money)
- a receiving deal with related to a Coinbase account (the place you let Coinbase have possession of your money in return for an IOU)
You do not have a personal key (and you do not want one as long as you retain that seed-phrase written down someplace protected – not on a pc)
I acquired 12 key phrases
That’s nearly actually a seed phrase, additionally known as a recovery-phrase or backup-phrase.
Your grasp personal key’s generated from that seed phrase.
In a hierarchical deterministic (HD) pockets, that grasp personal key’s used to generate many pairs of personal keys and public keys.
For the commonest kinds of Bitcoin transaction, a public key’s used to generate a bitcoin deal with to which cash will be despatched.
and a hash (beginning with 17) which I at all times thought was my bitcoin key.
A string of round 32, 33 letters and digits beginning with a “1” is an old-style of Bitcoin deal with that’s nonetheless legitimate and in style. It’s a Bitcoin deal with, not a personal key.
To see some examples take a look at some reference pages akin to
Word that the identical personal key will be proven to you in a number of other ways (encodings, display-formats).
From the above you must be capable to reassure your self that what you might have is a 12-word seed-phrase to your pockets and an unrelated bitcoin deal with to your Coinbase account.