Harry Mack
type: MusicGroup
description: Harry Hamilton McKenzie (born February 17, 1990), commonly known as Harry Mack, is an American rapper, producer, drummer, and YouTuber from Portland, Oregon, known for his viral freestyles performed i
popularity: 15
followers: 2
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfdbffb2a8e319194b6e56b4e7aeb78c92408d80089509d1bf5bef8192f505b84
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953626
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953626
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/25caec99-00a5-4ecc-b1a4-e63d81234b7d.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/25caec99-00a5-4ecc-b1a4-e63d81234b7d.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/25caec99-00a5-4ecc-b1a4-e63d81234b7d
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T11:41:45Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xfdbffb2a8e319194b6e56b4e7aeb78c92408d80089509d1bf5bef8192f505b84","name":"Harry Mack","registered_at":"2026-06-14T08:20:52Z","symbol":"NIM0393964","token_address":"0x14894c6f0cc0bcc80b09119fc4492d936adf3c48","type":"artist","uuid":"25caec99-00a5-4ecc-b1a4-e63d81234b7d"}
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbffb2a8e319194b6e56b4e7aeb78c92408d80089509d1bf5bef8192f505b84. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25caec99-00a5-4ecc-b1a4-e63d81234b7d.json and https://artists.proofprofile.net/proofs/artist/25caec99-00a5-4ecc-b1a4-e63d81234b7d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T11:41:45Z
  text: {"copyright_id":"0xfdbffb2a8e319194b6e56b4e7aeb78c92408d80089509d1bf5bef8192f505b84","name":"Harry Mack","registered_at":"2026-06-14T08:20:52Z","symbol":"NIM0393964","token_address":"0x14894c6f0cc0bcc80b09119fc4492d936adf3c48","type":"artist","uuid":"25caec99-00a5-4ecc-b1a4-e63d81234b7d"}
album: Need You
  type: MusicAlbum
  date published: 2025-02-14
album: Crazy
  type: MusicAlbum
  date published: 2025-03-21