Institutional Onchain Specification

The Global Defined Index for Financial Infrastructure

Document Currency is building the first structured framework for identifying transaction currencies, institutional entities, financial messages, tokenized assets, and cryptographic trust systems through a unified onchain index architecture.

Explore the Index Enterprise Inquiries
Document Currency Defined Index
Institutional Financial Infrastructure
Specification Version
DOCI-1.0
Registry Status
Public Specification
System Scope
TradFi + Decentralized Networks
Registry Type
Defined Index Architecture
§ 01

Registry Authority

Document Currency defines a structured methodology for the classification, identification, and validation of transaction currencies, financial messages, institutional entities, blockchain assets, and cryptographic trust systems operating across interconnected financial networks.

The Defined Index operates as a canonical reference layer — providing machine-readable identifiers, classification schemas, and validation rules that enable interoperability between traditional financial infrastructure and decentralized network protocols.

All registry entries are governed by the DOCI specification framework, ensuring consistency, auditability, and institutional-grade precision across every classification domain within the index.

Specification DOCI-1.0
Status Active
Scope Global
Network Onchain
Governance Institutional
Interop TradFi + DeFi
§ 02

Index Classification Domains

INDEX-001
Getting Started
Introduction to the DOCI framework, registry architecture, and how to navigate the defined index.
→ Read Section
INDEX-002
Transaction Currencies
Classification schema for fiat, digital, and tokenized transaction currencies across global financial networks.
→ Read Section
INDEX-003
Institutional Entities
Identification and validation methodology for banks, custodians, issuers, and regulated financial institutions.
→ Read Section
INDEX-004
Financial Messages
Structured classification of SWIFT, ISO 20022, and onchain financial message formats and identifiers.
→ Read Section
INDEX-005
Tokenized Assets
Registry framework for tokenized securities, real-world assets, and blockchain-native financial instruments.
→ Read Section
INDEX-006
API Reference
Complete technical reference for querying the DOCI registry, resolving identifiers, and integrating index data.
→ Read Section
§ 03

Quick-Start Reference

Query the DOCI registry to resolve a currency identifier and retrieve its full classification record.

# Resolve a DOCI currency identifier
GET https://api.documentcurrency.com/v1/index/resolve

# Request payload
{
  "doci_id":  "DOCI-CCY-USD-001",
  "scope":   "transaction_currency",
  "version": "1.0"
}

# Response
{
  "doci_id":          "DOCI-CCY-USD-001",
  "classification":  "Fiat — Sovereign Reserve Currency",
  "iso_4217":        "USD",
  "network_scope":   "TradFi + Onchain",
  "registry_status": "Active",
  "validated":       true
}
§ 04

Index Capabilities

[ ¶ ]
Canonical Identifiers
Globally unique DOCI identifiers for every classified entity, currency, and financial instrument in the registry.
[ ≡ ]
Structured Classification
Hierarchical taxonomy aligned with ISO standards, SWIFT conventions, and onchain protocol schemas.
[ ⊕ ]
Cross-Network Interop
Unified identifiers that resolve consistently across traditional financial rails and decentralized networks.
[ ✓ ]
Validation Rules
Machine-readable validation schemas for institutional-grade data integrity and compliance verification.
[ ⊞ ]
Onchain Registry
Immutable onchain anchoring of index records providing auditability and tamper-evident provenance.
[ ↗ ]
Enterprise API
RESTful and streaming API endpoints for real-time registry resolution, bulk export, and index integration.
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