Material recycling
RecycledID
The certificate of recycled mass.

Each RecycledID records the certified mass of recycled material, in tonnes, and its source MassID.
This contract issues RecycledID certificates and makes them available for lookup on the Carrot network.
What a RecycledID records.
The quantity of material certified as recycled and its origin.
- Mass
- The certified quantity of recycled material, in tonnes.
- Verification
- The methodology applied to verify the material’s recycling.
- Origin
- The MassID of the batch backing the certificate, with its material, mass and journey.
The MassID records batch mass in kilograms. The RecycledID expresses the certified quantity in tonnes.
From batch to receipts.
Under BOLD Recycling, MassID verification leads to a RecycledID and the corresponding issuance of C-BIOW credits.
Does one certificate equal one credit?
No. A RecycledID records the certified outcome of one MassID. The amount of C-BIOW issued matches that outcome and may include fractions.
View the contract.
The address identifies the contract for this family. Each record it issues has its own number.
- Network
- Polygon Amoy · 80002
- Symbol
- RECYCLED-ID
Contract address
0x46C6701E61722131e0f2fd45B8140A23C33d7bBfView transactions and issued records.
Standard, custody and metadata
- Standard
- ERC-721 · non-transferable records
- Custody
- Issued records are held by the Vault contract.
- Issuance
- Issued when the MassID passes verification under a recycling methodology.
- Family metadata
This contract does not provide an IPFS reference.
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Can a RecycledID be revoked?
Yes, if the data underlying certification is invalidated. Revocation is blocked when credits from that certificate have already been sold. Its MassID and other certificates from the batch remain independent of that revocation. The history remains available for inspection.
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