1CERT.ORGGlobal Trust Registry

Standard

Standard for the 1Cert Identifier

Reference
1C-STD-001
Version
1.0
Status
Current
Issued
1 August 2026
Effective
1 August 2026

Sets the assignment, format, persistence and display requirements for the 1Cert Identifier assigned to every registry record.

Scope

Applies to every entity record and credential record published in the 1Cert.org registry.

  1. Assignment. One 1Cert Identifier is assigned to each entity record and each credential record at first publication. An identifier is assigned once and is never reassigned.
  2. Format. The canonical format is 1C-XXXX-XXXX: eight characters from A–Z excluding I and O and digits 2–9, in two groups of four, the final character being a check character computed over the preceding seven under ISO/IEC 7064 MOD 37-2. The machine format strips the hyphens.
  3. Persistence. The identifier survives every status change of its record, including revocation and withdrawal.
  4. Display. Every published record and verification result displays the identifier in canonical format.

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