Jack Gregg
type: MusicGroup
genre: vocal jazz
description: Jack Gregg is an American jazz bass player. He grew up in Memphis, Tennessee, where he started playing the bass at the age of 15. In 1961 he joined the Claude Thornhill Orchestra and toured with the b
popularity: 2
followers: 9
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xa459eababb8ded56e3c0d632e6d40e80537156992f3a6be64e35cb2cb7bfd60f
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954346
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954346
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/998d8cdc-42a5-4bfb-908c-c0b60a82aa9a.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/998d8cdc-42a5-4bfb-908c-c0b60a82aa9a.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/998d8cdc-42a5-4bfb-908c-c0b60a82aa9a
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:51:26Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xa459eababb8ded56e3c0d632e6d40e80537156992f3a6be64e35cb2cb7bfd60f","name":"Jack Gregg","registered_at":"2026-06-17T19:30:07Z","symbol":"NIM1496141","token_address":"0xe7b97488fa3aa0a0e2ad857ca2a32eae1d0721d8","type":"artist","uuid":"998d8cdc-42a5-4bfb-908c-c0b60a82aa9a"}
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 0xa459eababb8ded56e3c0d632e6d40e80537156992f3a6be64e35cb2cb7bfd60f. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/998d8cdc-42a5-4bfb-908c-c0b60a82aa9a.json and https://artists.proofprofile.net/proofs/artist/998d8cdc-42a5-4bfb-908c-c0b60a82aa9a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:51:26Z
  text: {"copyright_id":"0xa459eababb8ded56e3c0d632e6d40e80537156992f3a6be64e35cb2cb7bfd60f","name":"Jack Gregg","registered_at":"2026-06-17T19:30:07Z","symbol":"NIM1496141","token_address":"0xe7b97488fa3aa0a0e2ad857ca2a32eae1d0721d8","type":"artist","uuid":"998d8cdc-42a5-4bfb-908c-c0b60a82aa9a"}