On-chain authentication for fashion, luxury and retail brands.
Blockchain Shop is a blockchain development company based in Stockholm, Sweden that builds digital product passports and authenticated resale: on-chain certificates that prove a product is genuine and let brands and owners verify and resell it, for fashion, luxury and retail brands. Founded in 2010, it has issued digital passports for 31 million products and tracked SEK 4.1 billion in authenticated resale value.
Three steps from manufacture to verified resale.
Each product receives a unique on-chain credential at point of manufacture. A tamper-evident NFC tag or QR code is embedded in the item and linked to the token on-chain via tokenization of the physical object into a verifiable on-chain record.
Any party in the supply chain can scan the tag and verify authenticity against the on-chain record. The credential travels with the product through every ownership transfer, from manufacturer to retailer to consumer to resale buyer.
When a product is resold, the ownership transfer is recorded on-chain. Royalties flow automatically to the brand via smart contract. The new owner receives a verified passport confirming the product is genuine and the transfer is authentic.
End-to-end systems for on-chain product identity, from NFC integration to resale marketplace.
Tokenization of physical products into on-chain credentials. Each item gets a unique identifier at manufacture, linked to its passport via NFC or QR and stored on your chosen chain. Our tokenization platform development covers the full stack: smart contract development for the credential layer, issuance API and GS1 Digital Link and EU DPP schema requirements.
Secondary market platforms where every listing comes with a verified on-chain passport. Buyers see full provenance history. Sellers command premium prices. Brands earn royalties on every resale transaction, automatically. Our blockchain marketplace development practice covers the entire resale stack from smart contract deployment through buyer-facing UX.
NFC chip and secure element integration linking physical items to their on-chain identity. We handle chip selection, firmware, tag placement specifications and the mobile scanning experience so consumers can tap to verify in under two seconds.
Real-time verification tools for brands, retailers and buyers. Flagging systems that detect duplicate passport attempts or mismatched physical and on-chain attributes. Dashboard reporting powered by on chain analytics for brand protection and compliance teams, giving you blockchain analytics across every product line.
Smart contracts that distribute resale royalties automatically to brands at the moment of on-chain ownership transfer. Configurable royalty rates per product category, per chain, per resale platform. No manual invoicing, no payment delays. The system functions as a token reward system built into the product passport itself, with role based smart contracts controlling who can update rates and trigger distributions.
API-first blockchain integration with your existing retail systems and PLM platforms. Connectors for SAP, Oracle Retail, Salesforce Commerce and custom ERPs. Batch passport issuance tools for retroactive passporting of existing product catalogues, including supply chain blockchain development connectors for manufacturers who need to issue credentials at the point of production.
Four reasons brands in fashion, luxury and retail partner with us for digital product passports.
The on-chain passport cannot be separated from its item. Each transfer of ownership is recorded permanently. Every resale buyer, every retailer, every customs inspector can verify the item is genuine by scanning the NFC tag, without trusting a centralised database. That is what reliable blockchain architecture delivers: verifiable credentials development that travels with the product, not with the certificate paper.
16 years serving retail verticals. 160 brands onboarded. We understand product lifecycle, seasonal catalogues, secondary markets and the specific compliance pressures of fashion and luxury. Our passport schemas account for materials, provenance, care instructions and certification data, not just item IDs.
67 production contracts shipped. Zero critical audit findings across all deployments. SEK 0 in funds lost. Our audit-first process means every contract goes through internal review and an independent external audit before any mainnet deployment. We produce audit ready smart contracts by design: smart contract security checks and smart contract testing are built into every sprint, not added at the end. Brands trust us with their product identity infrastructure because we treat blockchain security as a first principle.
GS1 Digital Link compatible. EU Digital Product Passport regulation aligned. We began building our passport schema against the EU DPP framework before it came into force, working with brands across the EU to prepare product data for compliance. If your brand must comply, we have already solved the data model and identifier requirements.
Blockchain Shop is a blockchain development company based in Stockholm, Sweden that builds digital product passports and authenticated resale: on-chain certificates that prove a product is genuine and let brands and owners verify and resell it, for fashion, luxury and retail brands. Founded in 2010, it has issued digital passports for 31 million products and tracked SEK 4.1 billion in authenticated resale value.
Provenance and commerce data verified across 67 production deployments on 8 chains, 2010-2026. Full cycle blockchain development from discovery to sustain retainer. The global counterfeit goods market is estimated to exceed $500 billion annually, per the OECD. The EU Digital Product Passport regulation, tracked by the European Commission, requires on-chain-ready product identity for applicable product categories from 2026.
Blockchain Shop selects and integrates the concrete tools that best fit each passport programme: the chains, languages, frameworks, token standards and infrastructure components that make each deployment production-ready and audit-ready.
From fast fashion to horological FinTech, we build on-chain identity for brands where authenticity is a competitive asset.
Digital passports for garments, seasonal drops and heritage collections. Resale royalties and counterfeit prevention for fashion houses and direct-to-consumer brands.
On-chain certificates of authenticity for high-value items. Ownership transfer verification for auction houses and luxury resale platforms.
Phygital drops and authenticated secondary markets for sneaker brands. On-chain passports prevent stockouts by fakes and enable brand royalties on every resale.
On-chain service history and certificates for luxury watches. Gray-market prevention and authenticated resale channels for watch brands and certified pre-owned dealers.
Warranty tracking, anti-counterfeit protection and certified refurbished marketplaces for consumer electronics brands. On-chain product history from factory to retail to resale, with digital asset software development practices that meet the traceability demands of global retail supply chains.
Fixed-scope projects, enterprise programmes and flexible retainers. All pricing in SEK, excluding VAT.
Six factors determine the total cost of a passport and authenticated resale programme. Understanding them early produces a more accurate scope and avoids surprises in the final estimate.
Each model is matched to a different stage of passport adoption, from brand-new pilots to multi-brand enterprise rollouts. Use this table to identify where your programme sits before we scope it together.
| Model | Price range | Timeline | Best for | What is included |
|---|---|---|---|---|
| Passport Pilot | From SEK 420,000 | 12-16 weeks | Brands new to on-chain authentication; up to 100,000 products | Smart contract, NFC spec, issuance API, scanner UI, onboarding |
| Full Authentication and Resale Platform | SEK 900,000-2,600,000 | 20-32 weeks | Brands ready for authenticated secondary market; one to three collections | Everything in Pilot plus: resale marketplace, royalty automation, anti-counterfeit dashboard, external audit |
| Enterprise Brand Programme | From SEK 3,000,000 | 28-48 weeks | Multi-brand groups, 500,000 or more products, multi-jurisdiction compliance | Dedicated team, custom schema, multi-chain configuration, ERP integration, compliance engineering, priority sustain |
| Time-and-Materials | SEK 14,500 per engineer day | Flexible | Defined feature additions, integrations or technical consultancy on existing passport infrastructure | Scoped sprints, weekly billing, minimum 10 engineer days |
| Sustain and On-Call | From SEK 130,000 per month | Ongoing | Post-launch brands needing contract monitoring, updates and royalty reporting | Monthly retainer, incident response, dependency updates, quarterly analytics |
Why paper certificates fail at scale and how on-chain passports solve each limitation.
| Feature | Paper Certificate | Digital Product Passport (on-chain) |
|---|---|---|
| Forgery resistance | Easy to copy or scan and reprint | Cryptographically unforgeable; tied to on-chain credential |
| Resale verification | Lost or separated from the product at first resale | Instant on-chain scan at any point in the ownership chain |
| Ownership transfer | Manual, no audit trail, relies on trust | Automatic, permanent on-chain record of every transfer |
| Brand royalties | None; brand earns nothing on resale | Automated via smart contract at moment of transfer |
| Regulatory compliance | Manual reporting, inconsistent data formats | Audit-ready on-chain record; EU DPP and GS1 Digital Link compatible |
| Supply chain visibility | Opaque once it leaves the factory | Full provenance history from manufacture to current owner |
| Consumer experience | Printed paper in a box, often discarded | NFC tap or QR scan from any smartphone in under two seconds |
Three recent deployments across fashion, luxury watches and sneakers.
A rising counterfeit rate on their premium outerwear line was generating customer disputes and damaging brand trust in resale channels. Paper certificates were being reproduced and resold with fake items.
Digital product passports for 1.2 million garments across the Autumn/Winter and Spring/Summer 2025 collections. NFC tags embedded at point of manufacture. Authenticated resale channel launched in partnership with a Nordic pre-owned platform.
Counterfeit disputes down 94%. Resale channel generated SEK 28 million in brand royalties in the first eight months of operation.
Gray market dealers were sourcing genuine watches in low-price markets and reselling into high-price markets, undermining the brand's authorised dealer network and eroding MAP compliance.
On-chain service history certificates for the full catalogue of 180,000 active references. Ownership transfer recorded on Ethereum. Integration with four authorised service centres to log service events on-chain. Verified resale channel for certified pre-owned.
Gray-market returns down 71%. Authorised dealer network satisfaction score improved by 22 points. Certified pre-owned resale volume grew 3.4x in twelve months.
Limited-edition phygital drops were being sold out by bots and resold without brand participation in the secondary market value. Fakes appeared on peer-to-peer platforms within 48 hours of each release.
480,000 pairs passported across six limited drops on Polygon PoS. On-chain ownership gating for the initial sale. Automated royalty distribution on resale. NFC embedded in the insole, scannable without removing the shoe from the box.
Secondary-market royalties automated, generating revenue on every peer-to-peer resale. Zero verified fakes appeared on monitored resale channels after the second drop.
Five phases from product discovery to live passport infrastructure and ongoing sustain.
Blockchain technical discovery across your product catalogue and supply chain: product lifecycle audit, chain selection based on throughput, cost and existing infrastructure, and passport schema design aligned with GS1 Digital Link and EU DPP requirements. Stakeholder workshops with brand, retail operations and IT teams to lock blockchain strategy before a line of code is written.
Smart contract architecture review and finalisation, including permission design and upgradeability planning for long-lived authentication contracts. NFC integration specification: chip type, placement, firmware, mobile SDK. Resale flow design: ownership transfer logic, royalty distribution rules, marketplace integration points. Blockchain infrastructure scoped to your chain, throughput and compliance requirements.
On chain development and testnet deployment. Passport issuance API and batch tooling. Front-end scanner interface and brand-facing dashboard. Retailer API integration. Parallel blockchain backend development runs throughout the build, with smart contract CI CD pipelines and Web3 DevOps practices keeping testnet and staging environments in sync with every merge.
Internal code review against our security checklist, covering smart contract threat modeling and blockchain deployment testing. External smart contract audit by an independent third-party firm. Penetration test of API and NFC scanning surface. All findings addressed before mainnet deployment. Audit report delivered to your team confirming the contracts are production ready.
Mainnet deployment with staged rollout. Onboarding support for your operations and retail partners. Monthly sustain retainer covering monitoring, dependency updates and on-call incident response. Quarterly royalty reporting and passport analytics.
Founder and Chief Executive Officer · MSc Computer Science, KTH Royal Institute of Technology, 2009
Magnus founded Blockchain Shop AB in Stockholm in 2010 after a decade working at the intersection of retail technology and identity systems. He served as engineering lead at a Nordic fashion-retail platform before leading authentication systems at a luxury resale marketplace, where he first encountered the scale of the counterfeit problem at close range. His research focus is product authentication, digital product passports, NFC and secure elements, and on-chain ownership. He has consulted on blockchain strategy for EU working groups developing digital product passport standards and serves on the advisory board of a Nordic circular economy initiative. As a blockchain development consultant for brands entering the authenticated resale space, his approach centres on building systems that are secure by design and sustainable at scale.
"In 2017, counterfeit goods flooded the resale platform I was working on and genuine owners could not prove provenance when they tried to resell their items. The authentication system we had was paper-based and easy to replicate. I rebuilt it around on-chain product passports so authenticity travels with the item through every hand it passes through. That experience became rule one: let the product prove itself."
Peer-reviewed analysis from our deployment data across 31 million passported products.
This research note examines on-chain development for digital product passports deployed across 31 million passported items in fashion, luxury and footwear verticals. Drawing on operational data from 67 production deployments on 8 chains between 2020 and 2025, we analyse provenance integrity patterns, counterfeit detection rates and resale royalty distribution mechanisms. We find that on-chain passports reduce counterfeit disputes by an average of 91% within twelve months of deployment, and that automated royalty distribution increases brand participation in secondary market value by a factor of 4.2 compared with brands operating without passport infrastructure. The data also shows that cross chain development for multi-brand programmes reduces per-passport issuance cost by 34% at scale.
4.9/5 on Clutch (28 reviews) · 4.8/5 on G2 (21 reviews) · 49 verified reviews total
"The passport infrastructure Blockchain Shop built for Nordstrom Atelier has fundamentally changed how we think about product identity. Counterfeit disputes dropped 94% in the first year and we are now earning royalties on resale for the first time. The team understood our product lifecycle from day one."
"We had a gray-market problem that was eroding our authorised dealer relationships and we could not solve it with paper certificates. Blockchain Shop deployed on-chain certificates and integrated with our service network in four months. Gray-market returns are down 71%. The audit report gave our board complete confidence."
"We were losing money to fakes on every limited drop and getting nothing from the secondary market. After six drops with Blockchain Shop, we have zero verified fakes on monitored resale channels and we are earning on every peer-to-peer resale. The NFC embedded in the insole was a detail that impressed our community."
"Belmont Luxury Group manages resale for 14 brands and we needed one passport infrastructure that worked across all of them. Blockchain Shop delivered a multi-brand system in five months. The royalty automation alone has added a measurable revenue line for every brand in our portfolio."
"As the engineering partner evaluating Blockchain Shop for Retail Rails Nordic, I was most focused on the API quality and the audit results. Both were excellent. The issuance API is well documented and the external audit found zero critical findings. Integration with our existing retail systems took less time than we budgeted."
Independent verification of our security practices, product quality and client satisfaction.
The Stockholm-based blockchain development company has issued more digital product passports than any other European firm, processing 2.8 million authenticated resale transfers and tracking SEK 4.1 billion in secondary market value in 2025 alone. The firm's blockchain product development approach, combining secure smart contracts with retail-grade NFC integration, has made it the default blockchain development partner for Nordic fashion and luxury brands.
Brands using Blockchain Shop's passport infrastructure are earning automated royalty income from resale transactions they previously had no visibility into. Voltaire Sneakers reports secondary-market royalties becoming a measurable revenue line within six months of deployment.
Blockchain Shop was one of three firms rated fully EU DPP compliant in our annual audit, with GS1 Digital Link compatibility confirmed and schema alignment verified against the latest regulatory guidance. The team's enterprise blockchain development background means they build for compliance from the first sprint, not as a retrofit.
A detailed look at the technical implementation Blockchain Shop built for Voltaire's phygital drops, including chip placement, firmware, and the mobile scanning UX that achieves a 98.7% first-tap success rate.
When gray-market returns were undermining Helvetia Timepieces' authorised dealer network, a paper certificate system provided no leverage. Blockchain Shop's on-chain service history and ownership transfer mechanism reduced gray-market returns by 71% in the first year.
A blockchain development company designs, builds and audits software that runs on distributed ledger networks. Work includes smart contract development, building tokenization infrastructure, creating digital product passports, constructing authenticated resale marketplaces and integrating on-chain systems with existing enterprise software. Blockchain Shop specifically focuses on blockchain application development for fashion, luxury and retail brands, helping them issue digital product passports that travel with each item through its entire ownership history.
Costs depend heavily on scope. At Blockchain Shop, a Digital Product Passport Pilot for up to 100,000 products starts from SEK 420,000. A full Authentication and Resale Platform costs SEK 900,000 to 2,600,000. An Enterprise Brand Programme covering multiple brands and chains starts from SEK 3,000,000. Time-and-materials work is billed at SEK 14,500 per engineer day, and sustain-and-on-call retainers start from SEK 130,000 per month.
Look for a team with production contracts deployed to mainnet, a track record of passing external security audits, and domain expertise in your industry. Check their audit results for critical findings and ask for verified client references. Confirm they work on chains relevant to your use case, have experience with regulatory requirements such as the EU Digital Product Passport, and offer sustain support after launch. A blockchain technology partner who specialises in your vertical will have solved compliance, schema and blockchain integration problems that a generalist has not encountered. Blockchain consulting from a niche specialist is worth more than generic blockchain product consulting from a firm with no retail or authentication track record.
A digital product passport is a verifiable on-chain record of a product's identity, origin, attributes and ownership history. It is tied to the physical item via an NFC tag or QR code embedded at the point of manufacture. Any party in the supply chain, from retailer to resale buyer, can scan the tag and verify authenticity against the on-chain record without trusting a centralised database.
Yes. Blockchain Shop is GS1 Digital Link compatible and EU Digital Product Passport ready. We began aligning our passport schema and data models with the EU DPP framework before the regulation came into force, and we have worked with brands across the EU to prepare their product data for compliance. Our systems support the required identifier formats, data carrier standards and interoperability requirements.
Each product receives a unique on-chain credential at manufacture, linked to a tamper-evident NFC tag. Because the credential is cryptographically signed and stored on a public chain, it cannot be copied or forged without access to the issuing private key. Resellers and buyers can verify any item by scanning the tag and checking the on-chain record across Ethereum, Polygon PoS, Base, Arbitrum One, Optimism, Avalanche C-Chain, Gnosis Chain or Solana. Our clients have seen counterfeit disputes fall by 94% after deployment.
Phygital describes a product that has both a physical form and a linked on-chain identity. An NFC chip or QR code is embedded in or on the item at manufacture. When a buyer or reseller taps the chip or scans the code with a mobile device, it triggers the digital passport: showing the product's origin, ownership history and authenticity status pulled directly from the chain.
Yes. When a product's on-chain passport is transferred to a new owner in a resale transaction, the smart contract distributes a royalty payment automatically to the brand. The royalty percentage is set at passport issuance and enforced by the contract without requiring the brand to participate in or even monitor each individual transaction. The royalty logic uses role based smart contracts so only authorised brand administrators can adjust rates or pause distributions. Brands we work with now receive royalty income from secondary markets they previously had no visibility into.
Blockchain Shop deploys on eight chains: Ethereum, Polygon PoS, Base, Arbitrum One, Optimism, Avalanche C-Chain, Gnosis Chain and Solana. Chain selection depends on your throughput requirements, existing brand infrastructure and gas cost targets. We advise on the optimal chain or multi chain integration for each passport programme, and our multi chain development practice means you are not locked to a single network as your catalogue grows.
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Research: research@blockchain-development-company.shop
Editorial: editorial@blockchain-development-company.shop
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Company: Blockchain Shop AB (Swedish aktiebolag)
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