Knowledge · Protocols
Protocols and standards
26 open protocols and standards behind holding, signing, consenting to and sharing your own data, grouped by the job each does, and how Praxamark™ relates to each.
These are the shared rules that let people name themselves and their keys, prove a claim, agree terms, keep their own data, show where something came from, publish, and work with AI agents. Each is open, and none of them needs Praxamark™.
For each, we say whether Praxamark uses it today, plans to, or meets it, only as far as Praxamark’s launch plan says. Missing one, or spotted something to correct? Suggest it, with a source if you have one.
- Decentralized Identifiers (DIDs) v1.0 (Naming a person or key, W3C, 2022). Praxamark uses. https://www.w3.org/TR/did-core/
- did:key method (Naming a person or key, W3C Credentials Community Group). Praxamark uses. https://w3c-ccg.github.io/did-key-spec/
- did:web method (Naming a person or key, W3C Credentials Community Group). Praxamark uses. https://w3c-ccg.github.io/did-method-web/
- did:webvh (did:web with verifiable history) (Naming a person or key, Decentralized Identity Foundation (Identifiers and Discovery WG)). Praxamark uses (web spaces); coming to hosted identities. https://identity.foundation/didwebvh/v1.0/
- Verifiable Credentials Data Model v2.0 (Proving a claim, W3C, 2025). Praxamark uses. https://www.w3.org/TR/vc-data-model-2.0/
- Data Integrity EdDSA Cryptosuites (eddsa-jcs-2022) (Proving a claim, W3C, 2025). Praxamark uses. https://www.w3.org/TR/vc-di-eddsa/
- IEEE 7012-2025, machine-readable personal privacy terms (MyTerms) (Agreeing terms and consent, IEEE, 2025). Praxamark uses. https://customercommons.org/myterms/agreements/
- ISO/IEC TS 27560:2023, consent record information structure (Agreeing terms and consent, ISO/IEC, 2023). Praxamark plans (receipts mapping). https://www.iso.org/standard/80392.html
- Consent Receipt Specification (Agreeing terms and consent, Kantara Initiative, 2018). Praxamark meets. https://kantara.atlassian.net/wiki/spaces/archive/pages/3508790/Consent+Receipt+Specification
- ODRL Information Model 2.2 (Agreeing terms and consent, W3C, 2018). Praxamark plans. https://www.w3.org/TR/odrl-model/
- Data Privacy Vocabulary (DPV) (Agreeing terms and consent, W3C Data Privacy Vocabularies and Controls Community Group). Praxamark plans. https://w3id.org/dpv
- Solid Protocol (Storing your data, Solid Community Group (W3C); a subset is being standardized by the W3C Linked Web Storage WG). Praxamark uses (Praxamark Atlas). https://solidproject.org/TR/protocol
- Solid-OIDC (Storing your data, Solid Community Group (W3C), 2022). Praxamark uses. https://solidproject.org/TR/oidc
- Portable Web Spaces (Storing your data). Praxamark uses (Praxamark Atlas).
- Encrypted Data Vaults (Storing your data, W3C Credentials Community Group / DIF). Praxamark meets. https://identity.foundation/edv-spec/
- Web Annotation Data Model (Annotating and provenance, W3C, 2017). Praxamark plans. https://www.w3.org/TR/annotation-model/
- PROV-O: The PROV Ontology (Annotating and provenance, W3C, 2013). Praxamark plans. https://www.w3.org/TR/prov-o/
- C2PA Content Credentials (Annotating and provenance, Coalition for Content Provenance and Authenticity, 2026). Praxamark meets. https://c2pa.org/specifications/
- ActivityPub (Publishing and social, W3C, 2018). Praxamark meets. https://www.w3.org/TR/activitypub/
- AT Protocol (Publishing and social, Bluesky; IETF Authenticated Transfer (ATP) working group formed 2026). Praxamark meets. https://atproto.com/
- Model Context Protocol (AI and agents, Agentic AI Foundation (Linux Foundation); started by Anthropic, 2024). Praxamark plans (local server for annotations). https://modelcontextprotocol.io/specification/
- Agent2Agent Protocol (AI and agents, Linux Foundation; started by Google, 2025). Praxamark meets. https://a2a-protocol.org/
- Human Context Protocol (AI and agents, Stanford Digital Economy Lab and Consumer Reports Innovation Lab). Praxamark plans (design only).
- RFC 9449, OAuth 2.0 Demonstrating Proof of Possession (DPoP) (Storing your data, IETF, 2023). Praxamark uses (Solid). https://www.rfc-editor.org/rfc/rfc9449
- RFC 7636, Proof Key for Code Exchange (PKCE) (Storing your data, IETF, 2015). Praxamark uses (Solid). https://www.rfc-editor.org/rfc/rfc7636
- schema.org (Annotating and provenance, schema.org community). Praxamark uses (Solid posts). https://schema.org/
This page names the products, services and companies of third parties for illustration and teaching only. All product and company names are trademarks™ or registered® trademarks of their respective holders. Naming them does not imply any affiliation with, endorsement by, or association of any kind between them and Identity Praxis, Inc.