Voluntary Biodiversity Units

Overview

The Protocol for the Issuance of Voluntary Biodiversity Units, version 4.0, defines how Terrasos generates Biodiversity Units, known as Tebu, through conservation and restoration projects. It sets requirements and procedures for the quantification, issuance, and monitoring of units, using factors such as ecosystem rarity, connectivity, threat and climate change vulnerability, project duration, and a social factor recognizing communities and nature stewards. One Tebu represents 10 square meters of preserved or restored ecosystem maintained under technical, financial, and legal conditions that ensure long-term permanence.

Sources: methodology document · Terrasos

01 · Roles

The workflow as an explicit directed graph. In Graph each column is one role, so you can see who acts at each step; every node names the org.broadlistening.policy.block.* def it resolves to plus its input and output record. Data flow switches to a lineage view that makes explicit what data each node needs and makes, with dependency arcs tracing every record back to the node that produced it, including where the Darwin Core occurrence + measurement records feed in. Hover to trace, click to inspect; revise edges (dashed) send work back.

03 · Generated lexicon records

The records this methodology compiles to, ready to write to a PDS. The first tabs are the new policy engine records; the ★ claim.activity tab and those after it are reused ATProto Collective Funding Ecosystem records (org.hypercerts.*): the issued hypercert batch, its rights, an example verification attachment and a retirement receipt. The ◈ dwc.occurrence and ◈ dwc.measurement tabs are the Darwin Core field evidence the monitoring node writes; see the section below.

{
  "$type": "org.broadlistening.policy.methodology",
  "code": "Tebu v4",
  "name": "Voluntary Biodiversity Units",
  "registry": "Terrasos (TER)",
  "sector": "Habitat banking",
  "creditType": "biodiversity",
  "status": "active",
  "version": "4.0",
  "scopes": [
    "Biodiversity",
    "Habitat banking"
  ],
  "roles": [
    {
      "id": "registry",
      "name": "Standard Registry",
      "permission": "Owns the policy, approves participants, anchors each issuance to its evidence."
    },
    {
      "id": "proponent",
      "name": "Project Proponent",
      "permission": "Registers the project and submits monitoring reports."
    },
    {
      "id": "vvb",
      "name": "Validation & Verification Body",
      "permission": "Independently validates the design and verifies monitored data."
    }
  ],
  "schemas": [
    "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.broadlistening.policy.schema/terrasos-tebu-bio-baseline",
    "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.broadlistening.policy.schema/terrasos-tebu-bio-monitoring"
  ],
  "graph": "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.broadlistening.policy.graph/terrasos-tebu",
  "issuesAs": "org.hypercerts.claim.activity",
  "workScope": "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.hypercerts.workscope.cel/terrasos-tebu-scope",
  "rights": "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.hypercerts.claim.rights/terrasos-tebu-rights",
  "createdAt": "2025-01-01T00:00:00.000Z"
}

04 · Schemas