I would like to obtain a copy of the deed of acquisition of a bi

Yes. Article 1435 of the Code of Civil Procedure provides that “Public or ministerial officers of documents are required to deliver, subject to their rights, dispatch or copy of documents to the parties themselves, to their heirs or assigns”. You will have to prove your qualityheir by any means (notarial deed in particular) so that the notary can give you a copy.