> For the complete documentation index, see [llms.txt](https://bsv-case-studies.bsvblockchain.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bsv-case-studies.bsvblockchain.org/supply-chain/il-sigillo.md). # Il Sigillo
### Project Overview * **Company:** Doremi Systems * **Product:** Il Sigillo — Verified Italian Kitchens of Korea * **Industries:** Supply Chain, Compliance, Digital Product Passports, Identity, and AI * **Geographic Reach:** South Korea, across 24+ cities * **Website:** [sigillo.doremisystems.com](https://sigillo.doremisystems.com) Il Sigillo is a verified registry of authentic Italian kitchens in South Korea. It lists 132 kitchens across 24 cities. Fifty-eight kitchens are sealed on-chain. Doremi Systems evaluates each kitchen using a Michelin-style editorial model. Restaurants cannot apply, pay, or request evaluation. Listings use three trust states: **Pending**, **Il Sigillo**, and **Riverifica in Corso**. Each verified badge lasts 12 months. The registry supports city and neighbourhood filters, deep links, QR table tents, and batch-sealed certificates. ### Business Challenges Italian cuisine is widely imitated in South Korea. Diners lack a reliable authenticity signal. Authentic restaurants also lack a formal way to show their investment. The existing environment had five key limitations: * Platform ratings measure service and satisfaction, not culinary authenticity. * Restaurants can self-declare Italian credentials without independent verification. * Existing designations are static and lack a renewal cycle. * Authenticity evidence remains inaccessible in supplier or trade contexts. * No baseline registry supports market-wide comparison. ### Why BSV Blockchain? BSV provides a public, independent record for each verification. It supports three core requirements: * **Direct commitment:** Attestations are committed on-chain through `OP_RETURN`. * **Independent verification:** AuthSig/BRC-100 identity signatures verify Doremi Systems as the issuer. * **Provably fair draws:** BSV block hashes seed the monthly guest prize draw. Each transaction ID acts as the signature and timestamp of record. Anyone can verify a kitchen's status without relying on Doremi Systems' infrastructure. ### BSV Features Used * **Micropayments** for low-cost attestation writes. * **`OP_RETURN` timestamps** for immutable, publicly auditable verification events. * **Block-hash randomness** through the WhatsOnChain API for monthly prize draws. ### Solution Architecture Il Sigillo runs a six-step pipeline from assessment to renewal and guest engagement. #### 1. Evaluation Doremi Systems assesses ingredient sourcing, technique, and supplier relationships. Five criteria guide the process: * Correct Italian language and terminology. * Italian culinary culture, training, menu logic, and seasonal awareness. * In-person dining, authentic ingredients, and consistency over time. #### 2. Attestation and sealing Doremi Systems creates a signed attestation and batch-sealed certificate. Identity keys for Doremi Systems and Doremi Cucina establish the record's author. #### 3. On-chain anchoring The signed attestation is committed through `OP_RETURN` using an AuthSig-based protocol. The transaction ID confirms who verified the kitchen and when. #### 4. Registry publication Verified kitchens appear in the public registry. Visitors can filter listings by city, neighbourhood, and cuisine type. QR-coded table tents link guests directly to each profile. #### 5. Renewal cycle Badges expire after 12 months. Kitchens then move to re-verification and receive a new signed attestation. The same infrastructure supports fresh-truffle and Kora EVOO provenance registries. Both seal shipments individually on-chain. #### 6. Monthly guest prize draw Guest reviews generate a hash from the review, username, and restaurant name. This hash becomes the guest's ticket number. At a fixed monthly time, the system retrieves the BSV block hash. The closest ticket wins. Neither Doremi Systems nor participants can predict or influence the result. ### Implementation Process Doremi Systems built and deployed Il Sigillo in three months. The team developed the platform in-house. The implementation combines AI-assisted editorial tooling, AuthSig/BRC-100 signatures, and the WhatsOnChain API. The project is self-funded and operates independently. ### Outcomes & Business Impact The registry includes 132 kitchens in more than 24 Korean cities. Fifty-eight kitchens are sealed and verified on-chain. Seoul has 84 listed kitchens. Jeju has 10, and Goyang has nine. The registry also includes Cheongju, Sejong, Busan, Daejeon, and smaller cities. Verified kitchens actively share their status with guests. The standard applies to fine dining, hotel restaurants, neighbourhood trattorias, pizzerias, and cafés. Formal transaction and user metrics were unavailable at submission. ### Challenges & Mitigations Doremi Systems reported no significant technical or operational issues. AI tooling and BSV infrastructure provided a low-friction implementation path. `OP_RETURN` timestamps and AuthSig identity signatures created a credible, tamper-evident verification system. The team achieved this without major infrastructure investment. ### Future Vision Doremi Systems plans to assess more kitchens and expand the registry's geographic coverage. The platform will also extend into guest engagement and ingredient provenance. The attestation architecture already supports fresh-truffle and Kora EVOO registries. The team plans deeper BSV integration as the registry grows. ### About Doremi Systems Doremi Systems is a Korean boutique technology and digital-notary studio. Francesco Morello founded the company and has lived in Korea since 2006. The studio works alongside Doremi Cucina, an Italian-ingredient importer and distributor. Together, they build verification, provenance, and digital-notarization systems for the food and hospitality sector. **Website:** [sigillo.doremisystems.com](https://sigillo.doremisystems.com) **Email:** --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. 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