Holding Hemlock
type: MusicGroup
popularity: 2
followers: 403
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xc3ab8522b502ec435c31a7d6cb448314c77dc2b5cee26c9449d3c0e12ac3f31b
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953842
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953842
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0039f4a4-c177-47e1-a920-14aa319ebfab.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/0039f4a4-c177-47e1-a920-14aa319ebfab.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/0039f4a4-c177-47e1-a920-14aa319ebfab
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-15T22:22:30Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0xc3ab8522b502ec435c31a7d6cb448314c77dc2b5cee26c9449d3c0e12ac3f31b","name":"Holding Hemlock","registered_at":"2026-06-15T13:44:55Z","symbol":"NIM0726602","token_address":"0x9a8d1a9f429b759ec2fe0b6bcc26a349bd04ede4","type":"artist","uuid":"0039f4a4-c177-47e1-a920-14aa319ebfab"}
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 0xc3ab8522b502ec435c31a7d6cb448314c77dc2b5cee26c9449d3c0e12ac3f31b. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0039f4a4-c177-47e1-a920-14aa319ebfab.json and https://artists.proofprofile.net/proofs/artist/0039f4a4-c177-47e1-a920-14aa319ebfab.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-15T22:22:30Z
  text: {"copyright_id":"0xc3ab8522b502ec435c31a7d6cb448314c77dc2b5cee26c9449d3c0e12ac3f31b","name":"Holding Hemlock","registered_at":"2026-06-15T13:44:55Z","symbol":"NIM0726602","token_address":"0x9a8d1a9f429b759ec2fe0b6bcc26a349bd04ede4","type":"artist","uuid":"0039f4a4-c177-47e1-a920-14aa319ebfab"}
album: Holding Hemlock
  type: MusicAlbum
  date published: 2023-01-04
album: See Me Through
  type: MusicAlbum
  date published: 2023-10-20
album: Can't Feel It
  type: MusicAlbum
  date published: 2023-11-10
album: Everything Inside
  type: MusicAlbum
  date published: 2023-11-22
album: What of Perseverance (Live at Underground Pine Studios)
  type: MusicAlbum
  date published: 2024-03-09
album: Don't Waste My Time
  type: MusicAlbum
  date published: 2025-07-04
  track: Don't Waste My Time
    type: MusicRecording
    duration: PT5M45S
    duration ms: 345000
    explicit: false
    by artist: Holding Hemlock
    in album: Don't Waste My Time
      type: MusicAlbum
      date published: 2025-07-04
    isrc code: QZTB72526855
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T06:50:13+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x2768609d9a679a8216e5bd1dfc87a69b96cffef4995e876bbba27b3aaa07974d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959107
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959107
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB72526855
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T07:19:23Z
    additional property: OTSVerifyInstructions
      type: PropertyValue
      value: 1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 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. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp 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 0x2768609d9a679a8216e5bd1dfc87a69b96cffef4995e876bbba27b3aaa07974d. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTB72526855.
      date published: 2026-07-22T07:19:23Z
    audio: Don't Waste My Time
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 79.969
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.628
      additional property: Energy
        type: PropertyValue
        value: 0.389
      additional property: Speechiness
        type: PropertyValue
        value: 0.085
      additional property: Acousticness
        type: PropertyValue
        value: 0.044
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.109
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.312
      additional property: Loudness (dB)
        type: PropertyValue
        value: -15.792
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Something to Hold
  type: MusicAlbum
  date published: 2025-07-25
album: Firestarter
  type: MusicAlbum
  date published: 2025-08-30