Chris McGregor
type: MusicGroup
genre: free jazz
description: Christopher McGregor (24 December 1936 – 26 May 1990) was a South African jazz pianist, bandleader and composer born in Somerset West, South Africa. Early influences McGregor grew up in the then Tr
popularity: 3
followers: 1223
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8ac61f6b96108f8fecfb80d91e305457a75496cc2fca3a1de87d0a39f9abae22
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954065
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954065
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4ff33f59-d20d-4625-ace1-157204e5ea15.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/4ff33f59-d20d-4625-ace1-157204e5ea15.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/4ff33f59-d20d-4625-ace1-157204e5ea15
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:10:43Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8ac61f6b96108f8fecfb80d91e305457a75496cc2fca3a1de87d0a39f9abae22","name":"Chris McGregor","registered_at":"2026-06-16T17:31:25Z","symbol":"NIM1124352","token_address":"0x98f0890aa4914c4f685557236e6d39673d9557b6","type":"artist","uuid":"4ff33f59-d20d-4625-ace1-157204e5ea15"}
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 0x8ac61f6b96108f8fecfb80d91e305457a75496cc2fca3a1de87d0a39f9abae22. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ff33f59-d20d-4625-ace1-157204e5ea15.json and https://artists.proofprofile.net/proofs/artist/4ff33f59-d20d-4625-ace1-157204e5ea15.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:10:43Z
  text: {"copyright_id":"0x8ac61f6b96108f8fecfb80d91e305457a75496cc2fca3a1de87d0a39f9abae22","name":"Chris McGregor","registered_at":"2026-06-16T17:31:25Z","symbol":"NIM1124352","token_address":"0x98f0890aa4914c4f685557236e6d39673d9557b6","type":"artist","uuid":"4ff33f59-d20d-4625-ace1-157204e5ea15"}
album: Chris McGregor's Brotherhood of Breath
  type: MusicAlbum
  date published: 2002
album: Sea Breezes
  type: MusicAlbum
  date published: 2012
album: Sea Breezes
  type: MusicAlbum
  date published: 2012-09-23
album: Sea Breezes
  type: MusicAlbum
  date published: 2012-09-23
album: Sea Breezes
  type: MusicAlbum
  date published: 2012-09-23
album: African Sound
  type: MusicAlbum
  date published: 2016-01-15