Calvin Horsch
type: MusicGroup
popularity: 4
followers: 223
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x33ab91bfe9f058161326fe308067029d3127ccd83c9c9dac6824dffcbae85cb2
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954025
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954025
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3855f6be-82b8-4c76-b7d1-be6dfe8ca656.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/3855f6be-82b8-4c76-b7d1-be6dfe8ca656.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/3855f6be-82b8-4c76-b7d1-be6dfe8ca656
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T00:32:47Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x33ab91bfe9f058161326fe308067029d3127ccd83c9c9dac6824dffcbae85cb2","name":"Calvin Horsch","registered_at":"2026-06-16T09:13:52Z","symbol":"NIM1005642","token_address":"0xcd1595d78faf4a37c90c12889a7e915576b6d80b","type":"artist","uuid":"3855f6be-82b8-4c76-b7d1-be6dfe8ca656"}
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 0x33ab91bfe9f058161326fe308067029d3127ccd83c9c9dac6824dffcbae85cb2. Chain 2 (Bitcoin): anchored in block 954027 (2026-06-17T00:55:08Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3855f6be-82b8-4c76-b7d1-be6dfe8ca656.json and https://artists.proofprofile.net/proofs/artist/3855f6be-82b8-4c76-b7d1-be6dfe8ca656.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T00:55:08Z
  text: {"copyright_id":"0x33ab91bfe9f058161326fe308067029d3127ccd83c9c9dac6824dffcbae85cb2","name":"Calvin Horsch","registered_at":"2026-06-16T09:13:52Z","symbol":"NIM1005642","token_address":"0xcd1595d78faf4a37c90c12889a7e915576b6d80b","type":"artist","uuid":"3855f6be-82b8-4c76-b7d1-be6dfe8ca656"}
album: Voor altijd
  type: MusicAlbum
  date published: 2023-03-18
album: Numero uno
  type: MusicAlbum
  date published: 2023-11-03
album: Mijn Hartendief Zo Lief
  type: MusicAlbum
  date published: 2024-09-13
  track: Mijn Hartendief Zo Lief
    type: MusicRecording
    duration: PT3M19S
    duration ms: 199868
    explicit: false
    by artist: Calvin Horsch
    in album: Mijn Hartendief Zo Lief
      type: MusicAlbum
      date published: 2024-09-13
    isrc code: NLW2R2394243
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-18T23:28:57+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x741b0d02082c68329506c7aa0ac76411dee114d6002758ae447a6f8de3cf4b5f
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958633
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958633
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NLW2R2394243
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-19T00:54:50Z
    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 0x741b0d02082c68329506c7aa0ac76411dee114d6002758ae447a6f8de3cf4b5f. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/NLW2R2394243.
      date published: 2026-07-19T00:54:50Z
    audio: Mijn Hartendief Zo Lief
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 119.999
      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: 0.652
      additional property: Energy
        type: PropertyValue
        value: 0.819
      additional property: Speechiness
        type: PropertyValue
        value: 0.061
      additional property: Acousticness
        type: PropertyValue
        value: 0.006
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.05
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.84
      additional property: Loudness (dB)
        type: PropertyValue
        value: -7.104
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Door Jou
  type: MusicAlbum
  date published: 2025-05-16
album: Weet
  type: MusicAlbum
  date published: 2025-11-07