AI skills & artifacts
A trusted supply chain for the AI capability economy
As AI agents create, share, and execute skills and artifacts, trust becomes the bottleneck. Chainletter stamps provenance, freezes content, and makes every record verifiable — so humans and agents can collaborate with confidence.
The challenge
AI is moving from conversation to execution — but trust hasn’t kept up
As AI skills, prompts, and artifacts are shared across platforms and agents, there’s no reliable way to know who created them, whether they’ve been modified, or if they’re safe to use.
AI-generated skills and artifacts are shared without any proof of authorship — anyone can claim credit or inject malicious instructions
Files hosted on traditional servers can be silently modified after publication, breaking the trust chain for every downstream user and agent
Agents composing workflows from shared skills have no way to verify that each component is authentic and unmodified
The solution
Stamp, freeze, and verify — at every layer
Chainletter’s API creates an end-to-end trust chain from creator identity to immutable content delivery.
Verify the creator
Chainletter stamps creator identities on the blockchain, linking every published skill or artifact to a verified author. No impersonation, no anonymous tampering.
Freeze the content
When a skill is published, Chainletter generates a cryptographic hash and stores it on IPFS with a blockchain-stamped CID. Any modification produces a different hash, instantly exposing tampering.
Verify anywhere, anytime
Anyone — human or agent — can verify a skill’s authenticity by checking the CID against the blockchain record. No accounts, no API keys, no trust assumptions required.
How it works
From creation to verified distribution
A secure pipeline from creator to consumer — whether the consumer is a human developer or an autonomous agent.
Case study
Chainletter in action
DSoul used the Chainletter API to build a decentralized marketplace where humans and AI agents publish, discover, and execute verified AI skills. Chainletter verifies creator identities on the blockchain and freezes every published skill on IPFS with a content-addressed CID — creating a tamper-proof supply chain from author to consumer. If anyone modifies a single byte, the hash changes, instantly exposing the tampering.
What you can stamp
Every AI artifact your organization produces
Chainletter works with any digital file. If an AI or a human created it, Chainletter can stamp it.
Structured capability packages that teach models to perform tasks with precision and consistency
System prompts, behavioral personas, and interaction templates that define how an AI operates
Reports, analyses, generated code, and other artifacts produced by autonomous agents
Curated datasets and fine-tuning materials with verified provenance and version history
Hyperparameter sets, adapter weights, and deployment configs that define model behavior
Multi-step agent pipelines that combine verified skills into complex, auditable processes
For developers
Add trust to your AI platform in hours
The same API that powers DSoul is available to any organization building AI tools, agent frameworks, or skill marketplaces.
Clean, documented API
RESTful endpoints with full OpenAPI specs make it easy for AI coding assistants to generate working integrations. DSoul’s trust layer was built in days, not months.
Agent-ready workflows
AI agents can call the Chainletter API directly to stamp skills, verify artifacts, and maintain trust chains — all without human intervention.
Event-driven by design
Server-sent events stream stamp confirmations in real time, so your platform can react instantly when content is stamped, verified, or flagged.
Why Chainletter for AI
Trust infrastructure for the capability economy
As AI moves from conversation to execution, the organizations that build trust into their platforms will win.
Every stamped record is cryptographically hashed on the blockchain — modification is mathematically impossible
The same verification works whether the consumer is a developer or an autonomous agent composing a workflow
Stamp one file or ten thousand — the API handles batch operations, auto-expanding groups, and real-time events
No wallets, no tokens, no blockchain knowledge — just a REST API call and a verifiable record
Records are verified against the public blockchain, not our servers — your trust layer survives no matter what
DSoul built its entire trust infrastructure on the Chainletter API in days. Your organization can too
Backed by Qubic Labs — Proud recipient of a 2025 development grant from blockchain accelerator Qubic Labs.
Get started
Build trust into your AI platform
The same API that powers DSoul’s secure skill marketplace is ready for your organization. Start stamping verifiable records in minutes.
