Matilde Larsen
type: MusicGroup
popularity: 26
followers: 650
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x7becf2438e9ac18abf7400dd0deee13e13f170c36545bbf2fc8e9a200b845cc3
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/42bd217c-6d56-40f7-9b02-4f67d31acaf6.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/42bd217c-6d56-40f7-9b02-4f67d31acaf6.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/42bd217c-6d56-40f7-9b02-4f67d31acaf6
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-06-12T19:24:56Z
additional property: OTSCanonicalRecord
  type: PropertyValue
  value: {"copyright_id":"0x7becf2438e9ac18abf7400dd0deee13e13f170c36545bbf2fc8e9a200b845cc3","name":"Matilde Larsen","registered_at":"2026-06-11T17:49:12Z","symbol":"NIM0085672","token_address":"0x6ed5ee609502ae65e68344f77ab059a3a6e3af73","type":"artist","uuid":"42bd217c-6d56-40f7-9b02-4f67d31acaf6"}
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 0x7becf2438e9ac18abf7400dd0deee13e13f170c36545bbf2fc8e9a200b845cc3. 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/42bd217c-6d56-40f7-9b02-4f67d31acaf6.json and https://artists.proofprofile.net/proofs/artist/42bd217c-6d56-40f7-9b02-4f67d31acaf6.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
  date published: 2026-06-12T19:24:56Z
  text: {"copyright_id":"0x7becf2438e9ac18abf7400dd0deee13e13f170c36545bbf2fc8e9a200b845cc3","name":"Matilde Larsen","registered_at":"2026-06-11T17:49:12Z","symbol":"NIM0085672","token_address":"0x6ed5ee609502ae65e68344f77ab059a3a6e3af73","type":"artist","uuid":"42bd217c-6d56-40f7-9b02-4f67d31acaf6"}
album: Renditions
  type: MusicAlbum
  date published: 2021-01-28
  track: Hold Back The River - Piano Arrangement
    type: MusicRecording
    duration: PT4M13S
    duration ms: 253440
    explicit: false
    by artist: Matilde Larsen
    in album: Renditions
      type: MusicAlbum
      date published: 2021-01-28
    isrc code: UKG8V2100008
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-12T20:43:32+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x2a20653b85fb21734d1d883a369b552a70d81ffd35152c90e381e9ca7c823f10
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 957754
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/957754
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKG8V2100008
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-12T21:26:22Z
    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 0x2a20653b85fb21734d1d883a369b552a70d81ffd35152c90e381e9ca7c823f10. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKG8V2100008 — a six-check JSON result.
      date published: 2026-07-12T21:26:22Z
    audio: Hold Back The River - Piano Arrangement
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 124.968
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.64
      additional property: Energy
        type: PropertyValue
        value: 0.043
      additional property: Speechiness
        type: PropertyValue
        value: 0.057
      additional property: Acousticness
        type: PropertyValue
        value: 0.995
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.964
      additional property: Liveness
        type: PropertyValue
        value: 0.11
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.089
      additional property: Loudness (dB)
        type: PropertyValue
        value: -22.66
      additional property: Key Name
        type: PropertyValue
        value: F
      additional property: Mode Name
        type: PropertyValue
        value: Major
  track: Don't Know Why - Piano Arrangement
    type: MusicRecording
    duration: PT3M1S
    duration ms: 181500
    explicit: false
    by artist: Matilde Larsen
    in album: Renditions
      type: MusicAlbum
      date published: 2021-01-28
    isrc code: UKG8V2100010
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
      value: registered
    additional property: CopyrightRegisteredAt
      type: PropertyValue
      value: 2026-07-22T05:38:32+00:00
    additional property: CopyrightChainExplorerURL
      type: PropertyValue
      value: https://explorer.copyrightchains.com/tx/0x259b8a338e7d5e03a77e3bcea80e1eaa810240c83737bf3b214e29f027e7f0ff
    additional property: OTSHash
    additional property: OTSBitcoinBlock
      type: PropertyValue
      value: 959103
    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/959103
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKG8V2100010
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-22T05:56:21Z
    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 0x259b8a338e7d5e03a77e3bcea80e1eaa810240c83737bf3b214e29f027e7f0ff. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/UKG8V2100010 — a six-check JSON result.
      date published: 2026-07-22T05:56:21Z
    audio: Don't Know Why - Piano Arrangement
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 79.972
      additional property: Musical Key
        type: PropertyValue
        value: 5
      additional property: Mode (Major/Minor)
        type: PropertyValue
        value: 1
      additional property: Time Signature
        type: PropertyValue
        value: 4
      additional property: Danceability
        type: PropertyValue
        value: 0.597
      additional property: Energy
        type: PropertyValue
        value: 0.026
      additional property: Speechiness
        type: PropertyValue
        value: 0.048
      additional property: Acousticness
        type: PropertyValue
        value: 0.995
      additional property: Instrumentalness
        type: PropertyValue
        value: 0.948
      additional property: Liveness
        type: PropertyValue
        value: 0.109
      additional property: Valence (Positivity)
        type: PropertyValue
        value: 0.135
      additional property: Loudness (dB)
        type: PropertyValue
        value: -23.352
      additional property: Key Name
      additional property: Mode Name
album: Montero (Piano Arrangement)

Key Name
type: PropertyValue
value: F

Mode Name
type: PropertyValue
value: Major

Renditions
type: MusicAlbum
date published: 2021-01-28

Renditions
type: MusicAlbum
date published: 2021-01-28

Renditions
type: MusicAlbum
date published: 2021-01-28

Montero (Piano Arrangement)
type: MusicAlbum
date published: 2021-04-19