David Sandmark
type: MusicGroup
genre: swedish ballads
popularity: 7
followers: 112
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x80199d5deecb32562513413e356b2430c48f2543c613303a2c9df1b753b04acc
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954066
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954066
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/603c6da5-11bd-4515-bf25-dce940fb574b.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/603c6da5-11bd-4515-bf25-dce940fb574b.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/603c6da5-11bd-4515-bf25-dce940fb574b
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-17T08:11:48Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x80199d5deecb32562513413e356b2430c48f2543c613303a2c9df1b753b04acc","name":"David Sandmark","registered_at":"2026-06-16T23:06:44Z","symbol":"NIM1204353","token_address":"0x7c768a1fe7cc1c6e75523640acbedbbae6c3f108","type":"artist","uuid":"603c6da5-11bd-4515-bf25-dce940fb574b"}
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 0x80199d5deecb32562513413e356b2430c48f2543c613303a2c9df1b753b04acc. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/603c6da5-11bd-4515-bf25-dce940fb574b.json and https://artists.proofprofile.net/proofs/artist/603c6da5-11bd-4515-bf25-dce940fb574b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-17T08:11:48Z
  text: {"copyright_id":"0x80199d5deecb32562513413e356b2430c48f2543c613303a2c9df1b753b04acc","name":"David Sandmark","registered_at":"2026-06-16T23:06:44Z","symbol":"NIM1204353","token_address":"0x7c768a1fe7cc1c6e75523640acbedbbae6c3f108","type":"artist","uuid":"603c6da5-11bd-4515-bf25-dce940fb574b"}
album: Stressad av lugnet
  type: MusicAlbum
  date published: 2004-01-01
album: På ditt sätt
  type: MusicAlbum
  date published: 2006-07-01
album: När du blundar
  type: MusicAlbum
  date published: 2021-01-25
album: När du blundar
  type: MusicAlbum
  date published: 2021-01-25
  track: Klister
    type: MusicRecording
    duration: PT3M7S
    duration ms: 187800
    explicit: false
    by artist: David Sandmark
    in album: När du blundar
      type: MusicAlbum
      date published: 2021-01-25
    genre: swedish ballads
    isrc code: QZK6Q2237700
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-05T14:00:14+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x1221fb7b2d9af11dbb195d91045ed82ed5ccafaaa47e91ff82c23688be8baa8d
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 956826
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956826
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6Q2237700
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T19:27:56Z
    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 0x1221fb7b2d9af11dbb195d91045ed82ed5ccafaaa47e91ff82c23688be8baa8d. 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/QZK6Q2237700.
      date published: 2026-07-05T19:27:56Z
    audio: Klister
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 124.959
      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
        value: 0.579
      additional property: Energy
        type: PropertyValue
        value: 0.358
      additional property: Speechiness
        type: PropertyValue
        value: 0.029
      additional property: Acousticness
        type: PropertyValue
        value: 0.664
      additional property: Instrumentalness
        type: PropertyValue
        value: 0
      additional property: Liveness
        type: PropertyValue
        value: 0.228
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.214
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.083
      additional property: Key Name
        type: PropertyValue
        value: E
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Kantstött
  type: MusicAlbum
  date published: 2022-11-20
album: Hej då
  type: MusicAlbum
  date published: 2023-06-03
album: Orkar inte jaga
  type: MusicAlbum
  date published: 2023-10-18
album: Alla hjärtans dag
  type: MusicAlbum
  date published: 2024-02-14
album: Gråter
  type: MusicAlbum
  date published: 2024-03-29