The Thoughtchain Foundation stewards the Thoughtchain Protocol—the cryptographic substrate for verifiable cognition.
The Thoughtchain Foundation is an independent, nonprofit steward of the Thoughtchain Protocol.
We maintain the canonical specification, uphold protocol governance, and ensure continuity of its underlying architecture.

The protocol provides versioned memory, structured reasoning, and verifiable records.

This is not a startup.
Not a token.
Not a product.

It is a substrate.
Matthew Wise
Protocol Architect & Creator and Civic Steward
Founder, Thoughtchain Foundation
Guiding principles:
Clarity over consensus
Continuity over disruption
Verifiability over persuasion
Read our Charter
Coming soon
Publications
Notes from the protocol. A space for canonical thinking: primitives, architectures, and epistemic structure.

Thoughtchain: A Cryptographic Protocol for Verifiable Cognition and Memory Integrity in Intelligent Systems

Thoughtchain is the first complete protocol for securing cognition itself. Authored by Matthew Wise, Sole Creator, Protocol Architect & Steward, the whitepaper extends the trust model of public-key cryptography and blockchain into the epistemic domain—making what an agent knew, remembered, and reasoned cryptographically verifiable. It defines the cryptographic substrate for verifiable cognition—anchoring memory, reasoning, and cognitive transitions in a public, version-controlled DAG—and formalizes six primitives: Proof of Prompt (PoP), Proof of Memory (PoM), Proof of Cognition (PoCog), Epistemic Diff, CommitID, and the Cognitive Virtual Machine (CVM). Thoughtchain establishes the epistemic trust layer beneath intelligent systems—where cognition itself becomes auditable.

Matthew Wise
on
August 12, 2025

The Lineage of Thoughtchain: Gödel, Turing, Nakamoto, Buterin—and the Emergence of Verifiable Cognition

An essay by Matthew Wise, Sole Creator, Protocol Architect & Steward of the Thoughtchain Foundation, tracing the lineage from Gödel and Turing to Nakamoto and Buterin, and introducing Thoughtchain as the next layer: a protocol for verifiable cognition grounded in versioned memory and cryptographic proof. This release precedes the Thoughtchain whitepaper and time-stamps authorship and design.

Matthew Wise
on
August 12, 2025
The Thoughtchain Protocol
Thoughtchain is a cryptographically verified version-controlled ledger for cognition.  

It provides a structured record of memory, reasoning, and agentic transitions in verifiable time.
Understand the Architecture
Read the Spec
Coming soon
Contact
This protocol is not a platform. 

It is civic infrastructure for cognition.

We do not accept token proposals.
signal@thoughtchain.foundation