Public Blockchain Registry
Verified Certificate of Analysis Search
Every COA is cryptographically anchored to a public blockchain at the time of submission.
The record is permanent and tamper-proof independently verifiable by anyone, at any time.
Transparency.
Integrity.
Trust.
Laboratories
Anchor COAs in under two minutes.
Upload your existing document or fill out the online form. Enter three fields. Receive a permanent CL number and QR code.
Lab Tools →Manufacturers
Give every batch a permanent record.
Print the CL number on labels and packaging. Buyers and distributors verify independently without contacting your lab.
For Manufacturers →Supply Chain & Customs
Verify at the point of inspection.
Search by CAS number or Lot number. Retrieve the original blockchain-anchored COA. No account. No fee.
For Supply Chain →How It Works
Lab submits the COA
Upload the document and enter CAS number, Lot number, and lab accreditation number.
Document is anchored
The COA is stored and anchored to the blockchain. A SHA-256 hash is generated as proof of integrity.
CL number issued
A permanent CL identifier and QR code are issued. Print on labels, packaging, and shipment documents.
Anyone can verify
Search compoundledger.org by CAS, Lot, or CL number. Retrieve the original COA instantly. Free forever.
