did:btcr2 is a censorship-resistant DID method using the Bitcoin blockchain as a Verifiable Data Registry to announce changes to the DID document. It improves on prior work by allowing: zero-cost off-chain DID creation; aggregated updates for scalable on-chain update costs; long-term identifiers that can support frequent updates; private communication of the DID document; private DID resolution; and non-repudiation appropriate for serious contracts.

References

• BTC Ordinals DID Method Specification (v0.1.0)
  • https://github.com/ordinalsreserve/did-btco/blob/main/spec.md 
• did:btcr2 Method Specification
  •  https://github.com/dcdpr/did-btcr2 
• DID Directory
  • https://diddirectory.com/ 
• Did:ion on The Rubric
  • https://rubric.cc/podcast/bitcoin-gets-ionic-didion/ 
• Digital Contract Design
  • https://contract.design/ 
• Digital Fiduciary Initiative 
  • https://digitalfiduciary.org 
• Internet Identity Workshop (IIW)
  • https://www.eventbrite.com/e/internet-identity-workshop-iiwxli-41-2025b-tickets-1393125719529 
• Legendary Requirements
  • http://legreq.com/
• MDIP DID Scheme
  • https://keychain.org/docs/mdip/scheme/ 
• Metalabel
  • https://www.metalabel.com/ 
• Metalabel at the W3C CCG meeting
  • https://anomalousthoughtforms.com/ 
• TABConf
  • https://7.tabconf.com 
• TruAge
  • https://www.mytruage.org/ 
• Unspent Transaction Output (UTXO)
  • https://en.wikipedia.org/wiki/Unspent_transaction_output 
• W3C DID Method Rubric v1.0
  • https://w3c.github.io/did-rubric/
• W3C List of DID methods 
  • https://w3c.github.io/did-spec-registries/#did-methods
• World Wide Web Consortium (W3C)
  • https://www.w3.org/ 

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Executive Producer: Joe Andrieu

Producer: Erica Connell

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