“One of the pioneering firms in web3 solutions, digital assets and tokenization, recognized for its innovation and solid reputation across Spain and Latin America.”
Jorge CorredorLawyer, Rincón Cuéllar & Asociados
Blockchain traceability. Ready for the digital passport.
We record every batch and every event in your supply chain on a shared, verifiable ledger, connected to your ERP and built for the EU digital product passport.
They trust Metlabs with their blockchain projects
Blockchain traceability
What does blockchain add to traceability?
A record of events that several companies in the chain share without any one of them controlling it. Each batch gets an identifier, each event is signed and its fingerprint is anchored on the network. The full data stays in your systems, and an auditor or customer can check that nobody has altered it.
2027
mandatory passports for certain batteries
EU Commission · 2026
18 months
minimum transition after each delegated act
EU Commission · 2026
8
harmonized standards for interoperability
EU Commission · 2026
What's included
What our blockchain traceability services include.
Every piece answers a question your supply chain must handle in front of a customer, an auditor or customs. Who did what, when and with which batch.
Identifier and QR code
A unique identifier per product or batch, printed as a QR code that opens its digital passport.
ERP integration
Connectors to your ERP, MES or WMS that capture each event without entering data twice.
On-chain anchoring
Every event signed and its hash anchored on-chain, batched together to keep costs down.
Digital product passport
The product's public record with origin, materials and repair data, per its delegated act.
Per-company permissions
Suppliers, manufacturers and carriers sign their own events with role-based permissions.
Public verification
A page that checks every record against the network, for customers, auditors and customs.
Architecture decision
What goes on-chain?
It is the decision that weighs most on cost and confidentiality. Anchoring the hash proves the data has not changed without publishing it. Storing it in full exposes it to anyone, and a permissioned network limits it to its members.
| Criterion | Event hash | Full data | Permissioned network |
|---|---|---|---|
| What the network stores | The event fingerprint and its timestamp. | The whole event, readable by anyone. | The event, on nodes run by authorized companies. |
| Confidentiality | High with a salted hash. The data cannot be rebuilt. | None. Prices and suppliers are exposed. | Limited to the network's members. |
| Cost per event | Low. Thousands of events fit in one Merkle root. | The highest, and it grows with event size. | No public gas, but nodes to run and govern. |
| Who can verify | Whoever receives the data checks it on-chain. | Anyone, on the block explorer. | Only those with network access. |
In the EU digital product passport, the operator keeps the data and the EU registry holds the identifier. Anchoring the hash on-chain fits that model.
Methodology
How we build your traceability system.
Four phases, each with a concrete deliverable. We start from your real supply chain, not from the technology, and nothing rolls out across the range without a pilot on a real product.
Who records what at each link and where a shared record removes reconciliation between companies.
What gets anchored, on which network and how it connects to your ERP, in an architecture document.
Registry contracts with role-based permissions, capture connectors and the public passport page.
Foundry and Slither testing, then a pilot on a real product before rolling out across the range.
Tools for a record you can verify.
Registry contracts in Solidity, EVM networks with a low cost per event, indexing to query the history and storage for documents.
- Solidity
The smart contract language for verifiable rules on EVM networks.
- Polygon
Polygon PoS: EVM contracts secured by its own validators, with low fees.
- Ethereum
EVM contracts, tokens and final settlement on an open Proof of Stake network.
- The Graph
A network of indexers for querying blockchain data with GraphQL.
- IPFS
Verifiable content storage addressed through content identifiers (CIDs).
- Node.js
A JavaScript runtime for backends, indexers and server-side Web3 services.
Use cases
How is blockchain used in the supply chain?
Wherever several companies must prove the same origin to a third party. These are the examples where it fits best.
Food origin
From field to package, with the plot, harvest and every processing step linked to the batch QR code.
Blockchain for Agribusiness
Textile passport and authenticity
Materials, manufacturing and repair of each garment, plus proof of authenticity on resale.
Blockchain for Fashion & Luxury
Pharmaceutical supply chain
Batches, temperatures and custody of each shipment, recorded by every party that handles it.
Blockchain for Pharma
Batteries and raw materials
Material origin and carbon footprint of industrial and electric vehicle batteries.
Blockchain for Energy & Sustainability
Reviews
What do our clients think of Metlabs?
“We structured the tokenization of real estate projects with them, and I value the team's ability to understand our corporate needs and genuinely solve them.”
Joan MejíaManager, GLOBYNE
“They advised us on the feasibility of tokenizing real estate assets in Uruguay with direct, cordial treatment. A professional team, responsive and always available.”
Álvaro Silva SantamaríaCEO, Sp Inmuebles
“Great professionals at structuring tokenized projects, with technical command and attention to detail that inspire full confidence at every stage of the work.”
Francisco BetancourtVerified Google review
“As a blockchain lawyer, I value their experience and professionalism in consulting and executing tokenization projects. Technology partners you can fully trust.”
Vanessa RivasBlockchain lawyer, El Salvador
“Great professionals, very attentive to their clients and always mindful of every detail. Working with their team has been a genuine pleasure from start to finish.”
CriptorentVerified Google review
“A very professional yet approachable company that empathizes with your doubts and needs. Highly recommended for entrepreneurs with a tokenization project.”
Javier EspasaTokenization entrepreneur
“Exceptional in every sense. From legal support I value their rigor and transparency: working with Metlabs means professionalism, innovation and security.”
Pedro A. Agúndez MéndezGoogle Local Guide
“Excellent service across blockchain development, asset tokenization and consulting. A very professional team that I recommend wholeheartedly, without reservation.”
José Luis DíazVerified Google review
“I have worked with them on several projects and they are very professional. A guarantee that everything turns out perfectly. Without a doubt, 100% recommended.”
Ignacio Fernández JiménezVerified Google review
“One of the pioneering firms in web3 solutions, digital assets and tokenization, recognized for its innovation and solid reputation across Spain and Latin America.”
Jorge CorredorLawyer, Rincón Cuéllar & Asociados
“Great professionals at structuring tokenized projects, with technical command and attention to detail that inspire full confidence at every stage of the work.”
Francisco BetancourtVerified Google review
“A very professional yet approachable company that empathizes with your doubts and needs. Highly recommended for entrepreneurs with a tokenization project.”
Javier EspasaTokenization entrepreneur
“I have worked with them on several projects and they are very professional. A guarantee that everything turns out perfectly. Without a doubt, 100% recommended.”
Ignacio Fernández JiménezVerified Google review
“We structured the tokenization of real estate projects with them, and I value the team's ability to understand our corporate needs and genuinely solve them.”
Joan MejíaManager, GLOBYNE
“As a blockchain lawyer, I value their experience and professionalism in consulting and executing tokenization projects. Technology partners you can fully trust.”
Vanessa RivasBlockchain lawyer, El Salvador
“Exceptional in every sense. From legal support I value their rigor and transparency: working with Metlabs means professionalism, innovation and security.”
Pedro A. Agúndez MéndezGoogle Local Guide
“They advised us on the feasibility of tokenizing real estate assets in Uruguay with direct, cordial treatment. A professional team, responsive and always available.”
Álvaro Silva SantamaríaCEO, Sp Inmuebles
“Great professionals, very attentive to their clients and always mindful of every detail. Working with their team has been a genuine pleasure from start to finish.”
CriptorentVerified Google review
“Excellent service across blockchain development, asset tokenization and consulting. A very professional team that I recommend wholeheartedly, without reservation.”
José Luis DíazVerified Google review
Team
In-house blockchain development team
Metlabs is a blockchain development company based in A Coruña, Spain. An in-house team covers every part of the project, from product and engineering to infrastructure and legal fit. The people who design your architecture write, test and deploy the code.
Meet the team- Projects in production
- +30
- In tokenized assets
- +$40M
- In‑house development
- 100%
Isaac González
Head of Innovation
Carlos Peña
Full Stack Engineer
Pablo Castro
DevOps Engineer
Helena Ramos
Product Designer
Javier Yáñez
Legal
Security
Security in blockchain traceability
Every delivery goes through the same checklist before it reaches mainnet. What changes between projects is the depth of each control, because an MVP does not carry the same risk as a contract that holds third-party funds.
Before mainnet
- Roles and permissions defined for every critical function
- Unit and invariant tests, and fuzzing on the logic that moves value
- Static analysis and peer review of every change
- Multisig and timelock on administration when the risk justifies it
- Custody and rotation of the deployment keys agreed
- External audit when the value at risk requires it
We work with leading audit firms
Blockchain development
More blockchain development services.
Connect your operations
Represent assets and rights
Blog
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IPFS vs Arweave: which to choose for decentralized storage
What a CID identifies, who maintains a copy and how IPFS pinning differs from Arweave’s storage model.
Let's build the rails for your product.
Tell us which product you want to trace and which companies are involved. We start with your supply chain map and what its passport requires.
