Duncan MacDonald
type: MusicGroup
genre: celtic
popularity: 10
followers: 26
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7bc884693b234f66c02cfce3e2cdf21891b2b3ba3dc5ce51e70252451edab83b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953924
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953924
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1ccffad0-8abd-4fbc-b5a6-bef08a2ffb2e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1ccffad0-8abd-4fbc-b5a6-bef08a2ffb2e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1ccffad0-8abd-4fbc-b5a6-bef08a2ffb2e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T09:52:28Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7bc884693b234f66c02cfce3e2cdf21891b2b3ba3dc5ce51e70252451edab83b","name":"Duncan MacDonald","registered_at":"2026-06-15T23:38:17Z","symbol":"NIM0868190","token_address":"0x7dde79dc8a4c77333bf26542c9bc38c1dd0c71c5","type":"artist","uuid":"1ccffad0-8abd-4fbc-b5a6-bef08a2ffb2e"}
additional property: OTSVerifyInstructions
  type: PropertyValue
  value: 1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc884693b234f66c02cfce3e2cdf21891b2b3ba3dc5ce51e70252451edab83b. Chain 2 (Bitcoin): anchored in block 953924 (2026-06-16T09:52:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ccffad0-8abd-4fbc-b5a6-bef08a2ffb2e.json and https://artists.proofprofile.net/proofs/artist/1ccffad0-8abd-4fbc-b5a6-bef08a2ffb2e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T09:52:28Z
  text: {"copyright_id":"0x7bc884693b234f66c02cfce3e2cdf21891b2b3ba3dc5ce51e70252451edab83b","name":"Duncan MacDonald","registered_at":"2026-06-15T23:38:17Z","symbol":"NIM0868190","token_address":"0x7dde79dc8a4c77333bf26542c9bc38c1dd0c71c5","type":"artist","uuid":"1ccffad0-8abd-4fbc-b5a6-bef08a2ffb2e"}
album: Water Gun, Volume I
  type: MusicAlbum
  date published: 2019-06-18