Johan Lofcrantz
type: MusicGroup
genre: hard bop
popularity: 4
followers: 94
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x58ae6116ffb4fc72790e5b9c81c2e24503cea7430a56204e7218bb3616f855bd
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954342
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954342
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9063ad2a-4cbf-461f-a515-ae0db6f1e28f.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/9063ad2a-4cbf-461f-a515-ae0db6f1e28f.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/9063ad2a-4cbf-461f-a515-ae0db6f1e28f
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-19T03:22:39Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x58ae6116ffb4fc72790e5b9c81c2e24503cea7430a56204e7218bb3616f855bd","name":"Johan Lofcrantz","registered_at":"2026-06-17T16:23:44Z","symbol":"NIM1451664","token_address":"0xa38bbb41e0dbfd90f753ebb91951be2ef0847970","type":"artist","uuid":"9063ad2a-4cbf-461f-a515-ae0db6f1e28f"}
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 0x58ae6116ffb4fc72790e5b9c81c2e24503cea7430a56204e7218bb3616f855bd. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9063ad2a-4cbf-461f-a515-ae0db6f1e28f.json and https://artists.proofprofile.net/proofs/artist/9063ad2a-4cbf-461f-a515-ae0db6f1e28f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-19T03:22:39Z
  text: {"copyright_id":"0x58ae6116ffb4fc72790e5b9c81c2e24503cea7430a56204e7218bb3616f855bd","name":"Johan Lofcrantz","registered_at":"2026-06-17T16:23:44Z","symbol":"NIM1451664","token_address":"0xa38bbb41e0dbfd90f753ebb91951be2ef0847970","type":"artist","uuid":"9063ad2a-4cbf-461f-a515-ae0db6f1e28f"}
track: After You've Gone
  type: MusicRecording
  duration: PT4M49S
  duration ms: 289066
  explicit: false
  by artist: Turner Layton
  by artist: Carin Lundin
  by artist: Martin Ostergren
  by artist: Johan Lofcrantz
  by artist: Mattias Welin
  by artist: Pablo Peres
  by artist: Esbjorn Ohrwall
  by artist: Dicken Hedrenius
  by artist: Magnus Lindgren
  by artist: Johan Setterlind
  by artist: Jan Sak
  by artist: Lisa Ostergren
  in album: From Dusk To Dawn
    type: MusicAlbum
    date published: 2000-01-01
  isrc code: SEBAA9701110
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-27T05:29:44+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x358a438a1e09dfd63c1cef2066cff55747d26df368d376ef02c18f49a929403e
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
    value: 956304
  additional property: OTSBitcoinBlockVerifyURL
    type: PropertyValue
    value: https://blockstream.info/api/block-height/956304
  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEBAA9701110
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-02T03:55:08Z
  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 0x358a438a1e09dfd63c1cef2066cff55747d26df368d376ef02c18f49a929403e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SEBAA9701110.
    date published: 2026-07-02T03:55:08Z
  audio: After You've Gone
    type: AudioObject
    additional property: Tempo (BPM)
      type: PropertyValue
      value: 117.755
    additional property: Musical Key
      type: PropertyValue
      value: 5
    additional property: Mode (Major/Minor)
      type: PropertyValue
      value: 0
    additional property: Time Signature
      type: PropertyValue
      value: 5
    additional property: Danceability
      type: PropertyValue
      value: 0.693
    additional property: Energy
      type: PropertyValue
      value: 0.139
    additional property: Speechiness
      type: PropertyValue
      value: 0.034
    additional property: Acousticness
      type: PropertyValue
      value: 0.953
    additional property: Instrumentalness
      type: PropertyValue
      value: 0.002
    additional property: Liveness
      type: PropertyValue
      value: 0.166
    additional property: Valence (Positivity)
      type: PropertyValue
      value: 0.249
    additional property: Loudness (dB)
      type: PropertyValue
      value: -18.868
    additional property: Key Name
      type: PropertyValue
      value: F
    additional property: Mode Name
      type: PropertyValue
      value: Minor