Marcus Hook Roll Band
type: MusicGroup
genre: glam rock
genre: power pop
description: Marcus Hook Roll Band were a studio group formed in London in 1972, by Harry Vanda and George Young (both ex-the Easybeats) as a session band to record their songwriting efforts. The group had two ver
popularity: 8
followers: 1600
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additional property: OTSVerifyInstructions
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  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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74702e61ba0605b685f8531bbba71c376b25fc5ee9d013734ba019cd3a59bea. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7ee3428-ab8b-45d7-a628-39c368ba117d.json and https://artists.proofprofile.net/proofs/artist/e7ee3428-ab8b-45d7-a628-39c368ba117d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-21T11:50:32Z
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album: Tales of Old Grand Daddy
  type: MusicAlbum
  date published: 1973
  track: Quick Reaction
    type: MusicRecording
    duration: PT3M2S
    duration ms: 182600
    explicit: false
    by artist: Marcus Hook Roll Band
    in album: Tales of Old Grand Daddy
      type: MusicAlbum
      date published: 1973
    genre: glam rock
    genre: power pop
    isrc code: AUAP07100019
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    additional property: OTSTimestamp
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    additional property: OTSVerifyInstructions
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      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
    subject of: OpenTimestamps Proof of Existence
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401187d8e8f58280f0427d9eb12695bc6cc6f1c47087e5985519fac8ae1a5a21. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/AUAP07100019.
      date published: 2026-07-05T19:27:56Z
    audio: Quick Reaction
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 123.539
      additional property: Musical Key
        type: PropertyValue
        value: 2
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
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      additional property: Danceability
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      additional property: Energy
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      additional property: Speechiness
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      additional property: Acousticness
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      additional property: Instrumentalness
        type: PropertyValue
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      additional property: Liveness
        type: PropertyValue
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      additional property: Valence (Positivity)
        type: PropertyValue
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      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.061
      additional property: Key Name
        type: PropertyValue
        value: D
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: Natural Man
    type: MusicRecording
    duration: PT3M47S
    duration ms: 227760
    explicit: false
    by artist: Marcus Hook Roll Band
    in album: Tales of Old Grand Daddy
      type: MusicAlbum
      date published: 1973
    genre: glam rock
    genre: power pop
    isrc code: AUAP07100015
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    additional property: OTSVerifyInstructions
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      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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
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      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed380077025cfda7771c3a4f36547b39e1d337a92e7cc847536e2c888e02b50b. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/AUAP07100015.
      date published: 2026-07-21T00:35:28Z
    audio: Natural Man
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 130.866
      additional property: Musical Key
        type: PropertyValue
        value: 4
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
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      additional property: Energy
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      additional property: Speechiness
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        value: 0.052
      additional property: Acousticness
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        value: 0.019
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name

Liveness
type: PropertyValue
value: 0.128

Valence (Positivity)
type: PropertyValue
value: 0.612

Loudness (dB)
type: PropertyValue
value: -8.904

Key Name
type: PropertyValue
value: E

Mode Name
type: PropertyValue
value: Major