Data sources

Every piece of evidence behind the Q-Day Index forecast is traced back to a registered source below. Registration does not by itself validate a claim -- see methodology for how evidence from each source is graded before it can affect the published forecast.

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Crypto protocol / blockchain (Tier A/B)

Bitcoin Improvement Proposals (Bitcoin Core) — tier A, Weekly collection
A protocol proposal is not a deployed protection.

Source detail and its evidence

Bitcoin Core repository (Bitcoin Core) — tier A, Weekly collection
A merged code change is not necessarily activated on-chain.

Source detail and its evidence

Ethereum Improvement Proposals (Ethereum Foundation) — tier A, Weekly collection
A roadmap is not a consensus decision.

Source detail and its evidence

Ethereum protocol documentation (Ethereum Foundation) — tier A, Weekly collection

Source detail and its evidence

secp256k1 implementation repository (Bitcoin Core) — tier A, Weekly collection

Source detail and its evidence

Expert elicitation / benchmark

Global Risk Institute Quantum Threat Timeline (Global Risk Institute) — tier B, On demand (not yet scheduled) collection
External expert-elicitation prior candidate -- never ingested as a hardware measurement.

Source detail and its evidence

Hardware and company technical (Tier B)

Atom Computing (Atom Computing) — tier B, Weekly collection

Source detail and its evidence

Google Quantum AI (Google) — tier B, Weekly collection
A company blog claim is not equivalent to a peer-reviewed or independently reproduced result.

Source detail and its evidence

IBM Quantum (IBM) — tier B, Weekly collection
Roadmaps are forecast inputs with uncertainty, not achieved capability.

Source detail and its evidence

Quantinuum (Quantinuum) — tier B, Weekly collection

Source detail and its evidence

Scientific and standards (Tier A)

arXiv (Cornell University / arXiv) — tier A, Daily collection
Legacy API rate limit: max 1 request / 3 seconds project-wide, single connection unless arXiv grants otherwise.

Source detail and its evidence

Crossref (Crossref) — tier A, Daily collection
Include an identifying mailto parameter and descriptive user agent; respect dynamic rate-limit headers.

Source detail and its evidence

ENISA Cryptography (ENISA) — tier A, Weekly collection

Source detail and its evidence

ETSI Quantum-Safe Cryptography (ETSI) — tier A, Weekly collection
Manual approval required for changes to formal standards.

Source detail and its evidence

NIST Post-Quantum Cryptography (NIST) — tier A, Weekly collection
Authoritative for standards/migration status; not direct proof of hardware progress unless reporting experimental results.

Source detail and its evidence

OpenAlex (OurResearch) — tier A, Daily collection
Usage-based/free daily allowance -- plan capacity accordingly.

Source detail and its evidence