Martin SjÖstedt
type: MusicGroup
genre: hard bop
genre: jazz
popularity: 25
followers: 357
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x741899cf87651907b8a02960ff4f40072fb1dfe07049afe652b9d9f251c7cd92
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953407
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953407
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1f8a05e2-5245-41cb-82b6-d2af09c5b41e.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/1f8a05e2-5245-41cb-82b6-d2af09c5b41e.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/1f8a05e2-5245-41cb-82b6-d2af09c5b41e
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x741899cf87651907b8a02960ff4f40072fb1dfe07049afe652b9d9f251c7cd92","name":"Martin SjÖstedt","registered_at":"2026-06-11T13:54:41Z","symbol":"NIM0041065","token_address":"0xb015a00a6307fa2b7764566142192e92f8a86825","type":"artist","uuid":"1f8a05e2-5245-41cb-82b6-d2af09c5b41e"}
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 0x741899cf87651907b8a02960ff4f40072fb1dfe07049afe652b9d9f251c7cd92. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f8a05e2-5245-41cb-82b6-d2af09c5b41e.json and https://artists.proofprofile.net/proofs/artist/1f8a05e2-5245-41cb-82b6-d2af09c5b41e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x741899cf87651907b8a02960ff4f40072fb1dfe07049afe652b9d9f251c7cd92","name":"Martin SjÖstedt","registered_at":"2026-06-11T13:54:41Z","symbol":"NIM0041065","token_address":"0xb015a00a6307fa2b7764566142192e92f8a86825","type":"artist","uuid":"1f8a05e2-5245-41cb-82b6-d2af09c5b41e"}
album: Whereabouts
  type: MusicAlbum
  date published: 2010-03-27
album: Whereabouts
  type: MusicAlbum
  date published: 2010-03-27
album: Whereabouts
  type: MusicAlbum
  date published: 2010-03-27
album: Good to Be
  type: MusicAlbum
  date published: 2012-08-27
album: Butterfly
  type: MusicAlbum
  date published: 2023-12-01
album: The Wedding
  type: MusicAlbum
  date published: 2024-01-05
album: Horizon
  type: MusicAlbum
  date published: 2024-02-09
  track: Butterfly
    type: MusicRecording
    duration: PT7M49S
    duration ms: 469456
    explicit: false
    by artist: Martin SjÖstedt
    in album: Horizon
      type: MusicAlbum
      date published: 2024-02-09
    genre: hard bop
    genre: jazz
    isrc code: SE7C62300101
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-31T18:53:44+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x5c8665b73e0701709cb0bbee856ac288a9ee26d9f0d497866e3bafd0d4fa5457
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 960455
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/960455
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE7C62300101
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-31T19:53:13Z
    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 0x5c8665b73e0701709cb0bbee856ac288a9ee26d9f0d497866e3bafd0d4fa5457. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/SE7C62300101.
      date published: 2026-07-31T19:53:13Z
    audio: Butterfly
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 123.968
      additional property: Musical Key
        type: PropertyValue
        value: 1
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 5
      additional property: Danceability
        type: PropertyValue
        value: 0.52
      additional property: Energy
        type: PropertyValue
        value: 0.431
      additional property: Speechiness
        type: PropertyValue
        value: 0.043
      additional property: Acousticness
        type: PropertyValue
        value: 0.556
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.861
      additional property: Liveness
        type: PropertyValue
        value: 0.047
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.684
      additional property: Loudness (dB)
        type: PropertyValue
        value: -14.524
      additional property: Key Name
        type: PropertyValue
        value: C#
      additional property: Mode Name
        type: PropertyValue
        value: Major
album: Horizon
  type: MusicAlbum
  date published: 2024-02-09