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@@ -235,8 +235,11 @@ Evident from [whitepapers](https://github.com/WebOfTrustInfo/ID2020DesignWorksho
 * [Blockstack DID Spec](https://github.com/blockstack/blockstack-core/blob/master/docs/blockstack-did-spec.md)[**[ϟ](https://forum.blockstack.org/t/did-method-at-identity-foundation/4287/9)**] 
 Blockstack is a network for decentralized applications where users own their identities and data. Blockstack utilizes a public blockchain to implement a decentralized naming layer, which binds a user's human-readable username to their current public key and a pointer to their data storage buckets.
 * [BTCR DID Method](https://w3c-ccg.github.io/didm-btcr/) — The Bitcoin Reference DID method (did:btcr) supports DIDs on the public Bitcoin blockchain. The Bitcoin Reference method has minimal design goals: a DID trust anchor based on the Bitcoin blockchain, updates publicly visible and auditable via Bitcoin transactions, and optionally, additional DID Document information referenced in the transaction OP_RETURN data field. No other Personal Identifiable Information (PII) would be placed on the immutable blockchain.
+   * [btcr tx conversion playground](https://weboftrustinfo.github.io/btcr-tx-playground.github.io/) 
 * [Identity Hubs Capabilities Perspective](https://github.com/WebOfTrustInfo/rebooting-the-web-of-trust-fall2017/blob/master/final-documents/identity-hubs-capabilities-perspective.md) - Identity Hubs currently proposed in the Decentralized Identity Foundation (DIF) are a subset of a general Decentralized Identifier (DID). 
 * [On DIF Hubs and Sovrin Agents](https://forum.sovrin.org/t/on-dif-hubs-and-sovrin-agents/897?u=phil)
+* [A Universally Unique IDentifier (UUID) URN Namespace](https://www.ietf.org/rfc/rfc4122.txt) <-DID's modeled after
+* [Interplanetary Identifiers IPID](https://github.com/jonnycrunch/ipid) - Implementation of the DID spec over IPFS (Interplanetary File System) 
 
 #### DID Auth[**^**](#Contents) 
    * [DID Auth and the Little I-am-Me](https://medium.com/@markus.sabadello/did-auth-and-the-little-i-am-me-ec14d757ff09)