Here are several articles on the blockchain and land registration. Note that some articles are Spanish and others in English.

1. Blockchain: Cómo desarrollar confianza en entornos complejos para generar valor de impacto social.

2. Hybrid Approaches for Smart Contracts in Land Administration: Lessons from Three Blockchain Proofs-of-Concept

3. BLOCKCHAIN EN LA ADMINISTRACIÓN PÚBLICA ¿Mucho ruido y pocos bloques?