DATACHAIN.
CHAIN ID 271828
PURITY 999/1000
LEDGER Datachain Rope

Tangible DC

Gold and silver, anchored to a sovereign chain.

A coin of pure 999 gold or silver, struck in European workshops, carrying a sealed chip and a digital twin on the Datachain Rope. A real asset you hold in your hand and prove on-chain. A knot you own.

Start investing → How it works

A real, verifiable patrimony

The metal carries the value. The chain carries the proof.

Designed by Datachain Foundation, Tangible DC unites two natures in a single object.

Held in safekeeping or passed down across generations, it is a tangible asset whose title of ownership lives on the blockchain.

Two strikes

Choose your Tangible DC

Struck in our partner workshops, Tangible DC coins are exceptional pieces whose value rests directly on the weight and purity of the metal.

Gold Tangible DC

Gold strike

Gold Tangible DC

Fine gold 999, indexed to the gold price.

Composition
Pure gold 999/1000
Diameter
45 mm
Thickness
2.5 mm
Weight
~ 42 g
Tracker
NFC sealed
On-chain title
Datachain Rope
Delivery
30 to 45 days
From~ 4 100 EUR / unit, indicative
View product page
Silver Tangible DC

Silver strike

Silver Tangible DC

Fine silver 999, indexed to the silver price.

Composition
Pure silver 999/1000
Diameter
45 mm
Thickness
2.05 mm
Weight
34.2 g
Tracker
NFC sealed
On-chain title
Datachain Rope
Delivery
30 to 45 days
From~ 865 EUR / unit, indicative
View product page

Indicative prices at 27/06/2026, excluding delivery and applicable fees. Value moves with the metal price. Firm quote on request.

One object, two natures

From the struck coin to the on-chain knot.

The Datachain Rope organizes ownership like a quipu: each wallet is a cord, each event a knot.

01 / STRIKE

The coin is struck

Pure 999 gold or silver, with an NFC chip sealed into the metal.

02 / SCAN

You tap your phone

A simple NFC tap reveals the coin's certificate and its digital twin.

03 / KNOT

A knot is born on the Rope

Ownership is recorded as a knot on your sovereign cord.

04 / EXCHANGE

You keep or you pass on

Keep the coin, pass it down, or transfer the title on Tanastok.

Beyond ownership

An asset that works as much as it reassures.

Holding a Tangible DC means owning a precious metal whose digital title opens four uses within the Datachain ecosystem.

01

Exchange

The title transfers like a tokenized real asset on Tanastok (ERC-3643), with ONCHAINID identity verification.

02

Staking

Commit your Tangible DC to ecosystem projects and share in real, non-inflationary revenue.

03

Trade programs

Eligible for programs backed by block-funds, Tangible DC opens complementary financial opportunities.

04

Reserve asset

A building block of a decentralized gold and silver reserve, serving targeted projects, notably diaspora economies.

How it's built

A sovereign stack, from the workshop to the chain.

Tangible DC runs on Datachain's own infrastructure, automated end to end; the title and its proof live on the Datachain Rope.

LAYER 01

Access & web

Multilingual storefront and cart. Order placement, payment and tracking. Built for desktop and mobile.

LAYER 02

Backend

Rust services on Axum with a PostgreSQL store. Automated assignment of 3D printers and jewelers, order state machine, email and Telegram notifications.

LAYER 03

Ledger & data

Datachain Rope (Chain ID 271828) records each coin as a knot. Decentralized data management replaces third-party storage.

LAYER 04

Payments & chip

Revolut Merchant API for card payments, crypto for OTC. NFC chip verified at minting, at the jeweler and on delivery.

The earlier proposal targeted Ethereum, XinFin and Solana on AWS with IPFS or BigchainDB. The fulfillment design is preserved; the chain, the data layer and the stack are now Datachain's own: Rust, PostgreSQL and the Datachain Rope.

Invest with clarity

Frequently asked questions

How does Tangible DC work?

Tangible DC is a coin of fine 999 gold or silver, delivered to your door. An NFC chip sealed into the metal links the coin to a digital title on the Datachain Rope.

How is the value set?

The value of a Tangible DC is determined by its weight of fine metal and moves with the gold or silver price, plus the costs of striking, certification and logistics.

What is the difference between the metal and the on-chain title?

The metal carries the value: a real, tangible asset you physically hold. The on-chain title carries the proof, recorded as a knot on your sovereign cord.

Can I resell freely?

Yes. As the holder of a physical coin, you may resell it freely. The associated digital title can be transferred on Tanastok, the ecosystem's tokenized real-asset market.

How do payment and delivery work?

Card payments are processed through Revolut; crypto is accepted for OTC. Delivery is 30 to 45 days for batches of 5 to 100 units, dropping to 15 to 30 days after full industrialization.

Who strikes the coins?

The coins are struck by our European partners, in the continuity of the inaugural coin number 00000. Each one is certified and paired with its digital title before shipping.

Discover the Tangible DC offer

Your first tangible asset, anchored to the chain?

Let's talk volumes, gold or silver strike, logistics and settlement. Our team issues a firm quote and guides you from order to delivery.

Your investment is exposed to fluctuations in the gold and silver markets. Past performance does not guarantee future performance.

ASSET NATURE: Tangible DC pairs a physical precious-metal coin of pure 999 with a digital title recorded on the Datachain Rope.

COMPLIANCE: exchange and settlement terms evolve with MiCA compliance in the European Union. Datachain Foundation SAS, RCS Paris 909 676 157.