Verified claim · AI-ML · 100% confidence
LangChain framework publicly released on: 2022-10-25 by Harrison Chase.
Last verified 2026-05-16 · Methodology veritas-v0.1 · c73295c7d563d226
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Structured fields
- Subject
- LangChain framework
- Predicate
publicly_released_on- Object
- 2022-10-25 by Harrison Chase
- Confidence
- 100%
- Tags
- langchain · framework · open-source · released_on · 2022
Sources (2)
[1] github release · Harrison Chase / LangChain AI · 2022-10-25
LangChain initial commit“Initial commit of LangChain framework. Building applications with LLMs through composability.”
[2] docs · LangChain AI · 2022-10-25
LangChain — Introduction
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LangChain framework publicly released on: 2022-10-25 by Harrison Chase. — SourceScore Claim c73295c7d563d226 (verified 2026-05-16). https://sourcescore.org/api/v1/claims/c73295c7d563d226.jsonEmbed this claim
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Frequently asked questions
Is the claim "LangChain framework publicly released on: 2022-10-25 by Harrison Chase." verified?
Yes — SourceScore verified this claim with 100% confidence as of 2026-05-16. The verification uses 2 primary sources cross-referenced against the SourceScore methodology (version veritas-v0.1). Full source list + signed JSON envelope linked below.
What is the evidence for "LangChain framework publicly released on: 2022-10-25 by Harrison Chase."?
Evidence comes from 2 primary sources: Harrison Chase / LangChain AI, LangChain AI. Each source is listed below with verbatim excerpts and URLs. The signed JSON envelope at https://sourcescore.org/api/v1/claims/c73295c7d563d226.json includes an HMAC-SHA256 signature for audit verification.
When was this claim last verified by SourceScore?
Last verified 2026-05-16 under methodology version veritas-v0.1. The signed JSON envelope is dated and cryptographically signed for audit trail. Re-verification cadence depends on the claim type and source freshness.
How can I cite this SourceScore claim in my code or article?
Fetch the signed JSON envelope from https://sourcescore.org/api/v1/claims/c73295c7d563d226.json which includes the verbatim claim, primary sources, confidence, methodology version, last-verified date, and HMAC-SHA256 signature for audit. The CC-BY-4.0 license permits commercial use with attribution to SourceScore.
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cURL
curl https://sourcescore.org/api/v1/claims/c73295c7d563d226.jsonJavaScript / TypeScript
const r = await fetch("https://sourcescore.org/api/v1/claims/c73295c7d563d226.json");
const envelope = await r.json();
console.log(envelope.claim.statement);
// "LangChain framework publicly released on: 2022-10-25 by Harrison Chase."Python
import httpx
r = httpx.get("https://sourcescore.org/api/v1/claims/c73295c7d563d226.json")
envelope = r.json()
print(envelope["claim"]["statement"])
# "LangChain framework publicly released on: 2022-10-25 by Harrison Chase."LangChain (retrieve-then-cite)
from langchain_core.tools import tool
import httpx
@tool
def get_langchain_framework_fact() -> dict:
"""Fetch the verified SourceScore claim for LangChain framework."""
r = httpx.get("https://sourcescore.org/api/v1/claims/c73295c7d563d226.json")
return r.json()