Marcus Belgrave
type: MusicGroup
genre: free jazz
genre: jazz funk
description: Marcus Batista Belgrave (June 12, 1936 – May 23, 2015) was an American jazz trumpet player from Detroit, born in Chester, Pennsylvania. He recorded with numerous musicians from the 1950s onwards. Belg
popularity: 13
followers: 2678
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x8e78edb2113205c2a84c05489c2d5d30cf7a60b80b6724289ed73873be0b121e
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953633
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953633
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/33de7e9b-e72c-4183-aa88-92028697a821.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/33de7e9b-e72c-4183-aa88-92028697a821.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/33de7e9b-e72c-4183-aa88-92028697a821
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-14T12:47:11Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x8e78edb2113205c2a84c05489c2d5d30cf7a60b80b6724289ed73873be0b121e","name":"Marcus Belgrave","registered_at":"2026-06-14T09:49:52Z","symbol":"NIM0415174","token_address":"0x0799db68efac870ddb3a08152e80ed7360db4417","type":"artist","uuid":"33de7e9b-e72c-4183-aa88-92028697a821"}
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 0x8e78edb2113205c2a84c05489c2d5d30cf7a60b80b6724289ed73873be0b121e. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/33de7e9b-e72c-4183-aa88-92028697a821.json and https://artists.proofprofile.net/proofs/artist/33de7e9b-e72c-4183-aa88-92028697a821.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-14T12:47:11Z
  text: {"copyright_id":"0x8e78edb2113205c2a84c05489c2d5d30cf7a60b80b6724289ed73873be0b121e","name":"Marcus Belgrave","registered_at":"2026-06-14T09:49:52Z","symbol":"NIM0415174","token_address":"0x0799db68efac870ddb3a08152e80ed7360db4417","type":"artist","uuid":"33de7e9b-e72c-4183-aa88-92028697a821"}
album: Gemini II
  type: MusicAlbum
  date published: 1974-01-01
  track: Space Odyssey
    type: MusicRecording
    duration: PT12M28S
    duration ms: 748040
    explicit: false
    by artist: Marcus Belgrave
    in album: Gemini II
      type: MusicAlbum
      date published: 1974-01-01
    genre: free jazz
    genre: jazz funk
    isrc code: USL4Q0809623
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-20T13:02:42+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x7459dc7db37499f503e70f537fd10bbad3eedc6e99e620808057cc4f0e1fccc3
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958891
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958891
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q0809623
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-20T16:03:11Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7459dc7db37499f503e70f537fd10bbad3eedc6e99e620808057cc4f0e1fccc3. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:03:11Z), 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/USL4Q0809623.
      date published: 2026-07-20T16:03:11Z
    audio: Space Odyssey
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 124.223
      additional property: Musical Key
        type: PropertyValue
        value: 11
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.446
      additional property: Energy
        type: PropertyValue
        value: 0.618
      additional property: Speechiness
        type: PropertyValue
        value: 0.063
      additional property: Acousticness
        type: PropertyValue
        value: 0.379
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.129
      additional property: Liveness
        type: PropertyValue
        value: 0.105
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.498
      additional property: Loudness (dB)
        type: PropertyValue
        value: -9.439
      additional property: Key Name
        type: PropertyValue
        value: B
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: Gemini II
    type: MusicRecording
    duration: PT5M37S
    duration ms: 337040
    explicit: false
    by artist: Marcus Belgrave
    in album: Gemini II
      type: MusicAlbum
      date published: 1974-01-01
    genre: free jazz
    genre: jazz funk
    isrc code: USL4Q0809626
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-16T13:11:48+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x000c202b0dc7a6ba6dd1e71d768620a121f21a6f094ed7d4deed14cbecf7f32f
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958303
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958303
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q0809626
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-16T16:39:24Z
    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
    subject of: OpenTimestamps Proof of Existence
      type: DigitalDocument
      encoding format: application/vnd.opentimestamps.ots
      description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000c202b0dc7a6ba6dd1e71d768620a121f21a6f094ed7d4deed14cbecf7f32f. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/USL4Q0809626.
      date published: 2026-07-16T16:39:24Z
    audio: Gemini II
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 128.692
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.394
      additional property: Energy
        type: PropertyValue
        value: 0.723
      additional property: Speechiness
        type: PropertyValue
        value: 0.092
      additional property: Acousticness
        type: PropertyValue
        value: 0.098
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.002
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
      additional property: Mode Name
album: Working Together
album: Live At Kerrytown Concert House
album: Tribute To Louis Armstrong
album: In the Tradition
album: You Don't Know Me
album: Marcus, Charlie & Joan.. Once Again
album: Lottie The Body’s Mood

Liveness
type: PropertyValue
value: 0.044

Valence (Positivity)
type: PropertyValue
value: 0.646

Loudness (dB)
type: PropertyValue
value: -8.095

Key Name
type: PropertyValue
value: C#

Mode Name
type: PropertyValue
value: Major

Working Together
type: MusicAlbum
date published: 1992

Live At Kerrytown Concert House
type: MusicAlbum
date published: 1995

Tribute To Louis Armstrong
type: MusicAlbum
date published: 2001

In the Tradition
type: MusicAlbum
date published: 2001

You Don't Know Me
type: MusicAlbum
date published: 2008-11-25

Marcus, Charlie & Joan.. Once Again
type: MusicAlbum
date published: 2009-02-06

Lottie The Body’s Mood
type: MusicAlbum
date published: 2015-10-30

Gemini II
type: MusicAlbum
date published: 2023-10-18