BSV:DID Universal Resolver

Overview

The BSV DID Resolver is a W3C DID Resolution service for resolving Decentralized Identifiers (DIDs) using the BSV blockchain method. It is a robust, scalable backend service that retrieves and formats DID data from the BSV blockchain.

What is DID Resolution?

DID Resolution is a W3C standard process for reading and presenting DID data to ensure interoperability across systems. When you resolve a DID, you retrieve:

• The DID Document (containing public keys, service endpoints, and other metadata)

• Document Metadata (information about the document itself)

• Resolution Metadata (information about the resolution process)

What is the BSV DID Method

The BSV DID Method is a method developed by the Teranode Group. The method uses chain of dust transactions to publish DIDs that leverage inherent properties of blockchain transactions and cryptography. Supported by this resolver is the implementation using the BSV blockchain.

• Method prefix: did:bsv

• Example DID: did:bsv:b5c8407a46b32c4a59b3fe0693860588b00a0e7464d252cc6ac47089925c1e8c

The DID identifier b5c8407a46b32c4a59b3fe0693860588b00a0e7464d252cc6ac47089925c1e8c is the hash of the issuing transaction, which guaranties uniqueness.

Implementation specifics

Because the BSV method uses chain of dust transactions, the Resolver must crawl the chain in order to resolve the last valid state of a DID. For this a specific API is needed and the current implementation uses the WhatsOnChain service APIs to provide the functionality.

Resolved DIDs are cached internally to reduce unnecessary WhatsOnChain API usage and improve performance.