The Harmonica Gentlemen
type: MusicGroup
description: The Harmonica Gentlemen was a trio consisting of George Fields (chromatic harmonica), Leo Friedman (chord harmonica), and Don Ripps (bass harmonica). They are largely remembered now for recording with
popularity: 3
followers: 10
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xfa9faea6a0428b4dd3f4653ee944ed6dddb241bc9cdb12144c25deb42996d74d
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953903
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953903
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/144def91-55fc-496f-ac33-34b8e505353e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/144def91-55fc-496f-ac33-34b8e505353e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/144def91-55fc-496f-ac33-34b8e505353e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-16T07:05:05Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xfa9faea6a0428b4dd3f4653ee944ed6dddb241bc9cdb12144c25deb42996d74d","name":"The Harmonica Gentlemen","registered_at":"2026-06-15T20:38:40Z","symbol":"NIM0825334","token_address":"0x48a50652d7cd15d961e86ee319b79a07fed47495","type":"artist","uuid":"144def91-55fc-496f-ac33-34b8e505353e"}
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 0xfa9faea6a0428b4dd3f4653ee944ed6dddb241bc9cdb12144c25deb42996d74d. Chain 2 (Bitcoin): anchored in block 953903 (2026-06-16T07:05:05Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/144def91-55fc-496f-ac33-34b8e505353e.json and https://artists.proofprofile.net/proofs/artist/144def91-55fc-496f-ac33-34b8e505353e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-16T07:05:05Z
  text: {"copyright_id":"0xfa9faea6a0428b4dd3f4653ee944ed6dddb241bc9cdb12144c25deb42996d74d","name":"The Harmonica Gentlemen","registered_at":"2026-06-15T20:38:40Z","symbol":"NIM0825334","token_address":"0x48a50652d7cd15d961e86ee319b79a07fed47495","type":"artist","uuid":"144def91-55fc-496f-ac33-34b8e505353e"}