I propose a complete rethinking after several pilot projects mentioned in the problem description.
A three-layer decentralized system that transforms how cities gather and validate material data:
Layer 1 — Commercial Layer: Decentralised “Scan Economy”
A gamified point-to-value system encourages citizens, residents, delivery workers, handymen, students, and building users
to contribute verified micro-scans of building elements. Participants earn municipal reward points redeemable for:
• municipal fees,
• public transport,
• local shops and services,
• cultural venues, etc.
This creates a stable, city-sanctioned incentive economy that converts micro-actions into valuable circularity data. Partnered companies (construction, maintenance, housing associations) will also be able to use configured ready to install professional sensors provided by the city, receiving tax benefits for high-quality verified data contributions.
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