Community Biochar (Bounty)

Overview

The DLT Earth Methodology Bounty Programme, run with Exponential Science and the Hedera Foundation, pays contributors to digitize and open source environmental crediting methodologies as machine-readable policies on the Hedera Guardian platform. Community Biochar refers to a biochar carbon methodology handled under this program and published in the open Guardian methodology library. Biochar methodologies quantify the carbon dioxide removed by converting waste biomass into biochar and storing it durably, and a credit generally represents one tonne of carbon dioxide equivalent removed.

Sources: methodology document · DLT Earth Bounty Program

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. 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.

{
  "$type": "org.broadlistening.policy.methodology",
  "code": "GF0001",
  "name": "Community Biochar (Bounty)",
  "registry": "DLT Earth Bounty Program (DLT)",
  "sector": "Biochar",
  "creditType": "removal",
  "status": "testing",
  "version": "1.0",
  "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/dlt-biochar-project-design",
    "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.broadlistening.policy.schema/dlt-biochar-monitoring-report"
  ],
  "graph": "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.broadlistening.policy.graph/dlt-biochar",
  "issuesAs": "org.hypercerts.claim.activity",
  "workScope": "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.hypercerts.workscope.cel/dlt-biochar-scope",
  "rights": "at://did:plc:bl0adl1sten1ngp0l1cyreg/org.hypercerts.claim.rights/dlt-biochar-rights",
  "createdAt": "2025-01-01T00:00:00.000Z"
}

04 · Schemas