@craigsolomon

Craig Solomon

@craigsolomonFloridaJoined April 2026

Founder, Fulcrum Enterprises — Building the Foundation for an AI Driven Future

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Founder, Fulcrum Enterprises. Building the foundation for an AI driven future.

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Freelance work

Craig Solomon's blogs

Craig Solomoncraigsolomon.hashnode.dev15 posts

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CSCraig Solomoncraigsolomon.hashnode.devAug 13 · 6 min read

Gating CI/CD Deploys with Offline Blockchain Proof Verification in Python

A release pipeline builds an artifact, anchors its hash, and ships it. Weeks later a hotfix branch gets merged out of order, a build cache serves a stale layer, or someone hand-edits a file in the dep

CSCraig Solomoncraigsolomon.hashnode.devAug 13 · 6 min read

A Zero-Dependency File Watcher for Automated Blockchain Anchoring in Node.js

Table of Contents Watching a Directory Without a Watcher Library Hashing and Submitting the Proof Handling Rate Limits and Retries Take It From Here A claims intake folder gets a new file every

CSCraig Solomoncraigsolomon.hashnode.devAug 6 · 7 min read

Concurrency-Limited SHA-256 Anchoring in Node.js: Semaphore Queuing, Retry, and Resumable Checkpoints

You hash a file, POST the digest, get a proof ID back. Simple for one file. At 2,000 files, three things break: the process terminates before it's done, a rate limit interrupts mid-batch, and re-submi

CSCraig Solomoncraigsolomon.hashnode.devAug 2 · 8 min read

Combining C2PA Content Credentials with Blockchain Timestamps in Python

You build a document intake pipeline. Files arrive with C2PA signing: device model, capture time, GPS coordinates, a cryptographic hash of the original frame. Rich provenance data, all embedded in the

CSCraig Solomoncraigsolomon.hashnode.devJul 30 · 8 min read

Idempotent File Anchoring in Node.js: Hash-First Deduplication

A document intake pipeline processes the same file twice. Different filenames, same bytes. Or a client resubmits a packet of evidence that was timestamped last month. Every duplicate call to a rate-li