See legislation:
R.D. Legislative 1/1996 of April 12. Revised Text of the Intellectual Property Law.
Law 23/2006, of July 7. Amending the revised text of the Intellectual Property Law, approved by Royal Legislative Decree 1/1996, of April 12, 1996.

WIPO. World Intellectual Property Organization

Safe Creative: Intellectual Property Registry (Ministry of Culture)

From the Rebiun page (University Libraries Network) a web page has been activated where all the documentation generated on Intellectual Property is collected.
Rebiun page

Useful document to consult in the page of Rebiun
FAQs on copyright (Rebiun)

To facilitate the work of researchers on the version to be made publicly available, the Sherpa/Romeo project
was created. This project studies the policies of scientific publishers with respect to open access and copyright agreements between authors and publishers. The Spanish domain Dulcinea identifies and analyzes the editorial policies of Spanish journals with respect to access to their texts and archives, the copyright on them and how these may affect their subsequent self-archiving or deposit in institutional or subject-specific repositories.

The Creative Commons licensesare designed to provide a more flexible framework for navigating the complex landscape of intellectual property law. They facilitate a balance between the rights of authors and the needs of users by allowing authors to transfer specific rights over their work, while reserving the remainder. This approach is encapsulated in the slogan “some rights reserved.”

These licenses are tailored to align with the unique legislative frameworks of each country.