Langva
type: MusicGroup
genre: norwegian pop
popularity: 10
followers: 964
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0xd092e5696c07fc49add69cf8f3a48ac4f68aa668c5e61ca11604ae79c2d61add
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 954516
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/954516
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a274a7b0-73d2-428d-8030-53d188c2a58c.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/a274a7b0-73d2-428d-8030-53d188c2a58c.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/a274a7b0-73d2-428d-8030-53d188c2a58c
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-20T07:04:44Z
additional property: OTSCanonicalRecord
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 0xd092e5696c07fc49add69cf8f3a48ac4f68aa668c5e61ca11604ae79c2d61add. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a274a7b0-73d2-428d-8030-53d188c2a58c.json and https://artists.proofprofile.net/proofs/artist/a274a7b0-73d2-428d-8030-53d188c2a58c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-20T07:04:44Z
album: Sapiens
  type: MusicAlbum
  date published: 2018-06-22
album: Lightsaber
  type: MusicAlbum
  date published: 2019-03-07
album: If I Had To
  type: MusicAlbum
  date published: 2020-01-24
album: Different Things
  type: MusicAlbum
  date published: 2020-03-13
album: Different Things
  type: MusicAlbum
  date published: 2020-07-03
album: All I Want from You
  type: MusicAlbum
  date published: 2021-08-23
album: All I Want From You
  type: MusicAlbum
  date published: 2021-08-23
album: In My Eyes
  type: MusicAlbum
  date published: 2021-10-15
album: Call Me
  type: MusicAlbum
  date published: 2021-11-15
album: Call Me
  type: MusicAlbum
  date published: 2021-11-15
  track: Call Me
    type: MusicRecording
    duration: PT2M38S
    duration ms: 158541
    explicit: false
    by artist: Langva
    in album: Call Me
      type: MusicAlbum
      date published: 2021-11-15
    genre: norwegian pop
    isrc code: NOCKK2138010
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-17T14:50:17+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x16431786b843e7ff5743c8c4370ff9d0495a0e2f8b98285d695f5275edb49510
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 958428
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/958428
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/NOCKK2138010
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-17T15:15:14Z
    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 0x16431786b843e7ff5743c8c4370ff9d0495a0e2f8b98285d695f5275edb49510. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/NOCKK2138010.
      date published: 2026-07-17T15:15:14Z
    audio: Call Me
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 89.999
      additional property: Musical Key
        type: PropertyValue
        value: 7
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 0
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.755
      additional property: Energy
        type: PropertyValue
        value: 0.53
      additional property: Speechiness
        type: PropertyValue
        value: 0.071
      additional property: Acousticness
        type: PropertyValue
        value: 0.03
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.402
      additional property: Liveness
        type: PropertyValue
        value: 0.136
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.895
      additional property: Loudness (dB)
        type: PropertyValue
        value: -11.16
      additional property: Key Name
        type: PropertyValue
        value: G
      additional property: Mode Name
        type: PropertyValue
        value: Minor
album: Kitsuné Musique Mix by Langva (DJ Mix)
  type: MusicAlbum
  date published: 2021-11-30
album: How Was I to Know
  type: MusicAlbum
  date published: 2022-01-21
album: Just for Fun
  type: MusicAlbum
  date published: 2022-06-10
album: Me & You
  type: MusicAlbum
  date published: 2022-09-16
album: Was It True
  type: MusicAlbum
  date published: 2022-12-09
album: It Don't Feel Like Summer
  type: MusicAlbum
  date published: 2023-06-16
album: Cool
  type: MusicAlbum
  date published: 2023-10-13
album: Be True
  type: MusicAlbum
  date published: 2023-12-08
album: Something About You
  type: MusicAlbum
  date published: 2024-05-10
album: Clock In The Hours
  type: MusicAlbum
  date published: 2024-06-21
track: Call Me - Mixed
  type: MusicRecording
  duration: PT2M15S
  duration ms: 135436
  explicit: false
  by artist: Langva
  in album: Café Kitsuné Mixed by Khazali (DJ Mix)
    type: MusicAlbum
    date published: 2022-08-29
  isrc code: FRU702200209
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-06-18T15:49:53+00:00
  additional property: CopyrightChainExplorerURL
    type: PropertyValue
    value: https://explorer.copyrightchains.com/tx/0x612791893b5689d7c9a1d61486da50a3794a509cedd8f09d2a26e2c0a42d2a8d
  additional property: OTSHash
  additional property: OTSBitcoinBlock
  additional property: OTSBitcoinBlockVerifyURL
  additional property: OTSVerificationAPI
  additional property: OTSTimestamp
  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Call Me - Mixed

OTSHash
type: PropertyValue

OTSBitcoinBlock
type: PropertyValue
value: 956302

OTSBitcoinBlockVerifyURL
type: PropertyValue
value: https://blockstream.info/api/block-height/956302

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRU702200209

OTSTimestamp
type: PropertyValue
value: 2026-07-02T03:30:09Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x612791893b5689d7c9a1d61486da50a3794a509cedd8f09d2a26e2c0a42d2a8d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRU702200209.
date published: 2026-07-02T03:30:09Z

Call Me - Mixed
type: AudioObject
additional property: Tempo (BPM)
  type: PropertyValue
  value: 111.321
additional property: Musical Key
  type: PropertyValue
  value: 7
additional property: Mode (Major/Minor)
  type: PropertyValue
  value: 0
additional property: Time Signature
  type: PropertyValue
  value: 5
additional property: Danceability
  type: PropertyValue
  value: 0.692
additional property: Energy
  type: PropertyValue
  value: 0.592
additional property: Speechiness
  type: PropertyValue
  value: 0.066
additional property: Acousticness
  type: PropertyValue
  value: 0.043
additional property: Instrumentalness
  type: PropertyValue
  value: 0.302
additional property: Liveness
  type: PropertyValue
  value: 0.106
additional property: Valence (Positivity)
  type: PropertyValue
  value: 0.867
additional property: Loudness (dB)
  type: PropertyValue
  value: -13.48
additional property: Key Name
  type: PropertyValue
  value: G
additional property: Mode Name
  type: PropertyValue
  value: Minor