I didn't mean it to be a reference to anything.  I was serious.  The word "provenance" is exactly what you want.  It's used to mean the verified story of an object's existence.  So, if I had a ball point ben, it might be worth 20p.  If I had a ball point pen that was provably the one that Paul McCartney wrote "Your Mother Should Know" with; then we might say it's "provenance" is known and it would be worth a few thousand.

In the context of bitcoins, you want a word without any positive or negative connotations that simply means "where these coins came from".  For me, "provenance" is that word.