I am José M spanish attorney
I want to be sure I have undertand your question properly, you want to know about the escritures of a propiety sold in spain in 2004 ?
Well, in order to get a copy of the escritures of the propiety you will have to know in the notaria where you did it
If you do not know which notario was you could ask in the propiety register obout a copia simple, oficial document which tell you the notaria where you signed it
Even with the catastral number you could ask for this copia simple
Onve you know wich notario was you could go and ask gor a copy of your documents, that´s all
Are you paying the taxes of the propiety now, in the tax sheet you will find the catastral number and with it you coud ask a hoja simple in the propiety register in order to know wich notario was where you signed
Please let mw know if you gor more doubts, tahnk you