Focus on the blockchain digital ecosystem: art on the web of value. In addition to the abstract formalization and mirage of automation associated with the blockchain, this issue examines how this recording technology has become a catalyst for artistic and cultural experimentation. The authors discuss practices that take on the universe of blockchain representations, museum and institutional experiments, as well as the application of this technology to art markets and to systems of governance in the arts sector. This collection of essays lets us shed light on the relationship between informality and technical formalization, and examine mutualist economies and new revenue models for the arts. This issue of espace art actuel provides a space for reflecting on these dynamics and their resonance within the challenges of art making and art organizations in the 21st century.