William Sundman Sääf
type: MusicGroup
genre: dark cabaret
genre: swedish ballads
popularity: 9
followers: 175
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
  type: PropertyValue
  value: https://explorer.copyrightchains.com/tx/0x276e0ac0191dcb67771d917defafd64700a8a0908456866f732f005c4d3974c0
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 953864
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/953864
additional property: OTSProofURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/04d51000-46a7-4b41-8866-3e85afb69a67.ots
additional property: OTSRecordURL
  type: PropertyValue
  value: https://artists.proofprofile.net/proofs/artist/04d51000-46a7-4b41-8866-3e85afb69a67.json
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/artist/04d51000-46a7-4b41-8866-3e85afb69a67
additional property: OTSTimestamp
  type: PropertyValue
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additional property: OTSCanonicalRecord
  type: PropertyValue
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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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276e0ac0191dcb67771d917defafd64700a8a0908456866f732f005c4d3974c0. Chain 2 (Bitcoin): anchored in block 953877 (2026-06-16T02:39:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04d51000-46a7-4b41-8866-3e85afb69a67.json and https://artists.proofprofile.net/proofs/artist/04d51000-46a7-4b41-8866-3e85afb69a67.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T02:39:16Z
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album: Live på Hasselbacken (Live på Hasselbacken 2022)
  type: MusicAlbum
  date published: 2022-10-10
album: Sundman tolkar Bellman
  type: MusicAlbum
  date published: 2023-05-30
album: Bellmantolkare live på Stallmästaregården (Live)
  type: MusicAlbum
  date published: 2024-01-08
album: Visan om doktor bauhaus och de fyra barnen
  type: MusicAlbum
  date published: 2024-03-02
album: Herr Bacchus
  type: MusicAlbum
  date published: 2025-02-05
  track: Herr Bacchus han är en riddare båld (StU XIV n:o 11 & 66)
    type: MusicRecording
    duration: PT4M55S
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    explicit: false
    by artist: William Sundman Sääf
    in album: Herr Bacchus
      type: MusicAlbum
      date published: 2025-02-05
    genre: dark cabaret
    genre: swedish ballads
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    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
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    additional property: OTSBitcoinBlockVerifyURL
      type: PropertyValue
      value: https://blockstream.info/api/block-height/956857
    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5BU2553731
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-06T01:26:17Z
    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 0x9d4dee0cebc9f46c7e10bf297e97313f8ddb46566df08a6f1f5c6af2f1ef2aeb. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE5BU2553731.
      date published: 2026-07-06T01:26:17Z
    audio: Herr Bacchus han är en riddare båld (StU XIV n:o 11 & 66)
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      additional property: Tempo (BPM)
        type: PropertyValue
        value: 128.394
      additional property: Musical Key
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      additional property: Mode (Major/Minor)
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      additional property: Time Signature
        type: PropertyValue
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      additional property: Danceability
        type: PropertyValue
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      additional property: Energy
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      additional property: Speechiness
        type: PropertyValue
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      additional property: Acousticness
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      additional property: Instrumentalness
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      additional property: Liveness
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      additional property: Valence (Positivity)
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      additional property: Loudness (dB)
        type: PropertyValue
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      additional property: Mode Name
        type: PropertyValue
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album: Hade jag sextusende daler (Fredmans sång n:o 14)
  type: MusicAlbum
  date published: 2025-02-28
album: Uppå Vattnets lugna våg
  type: MusicAlbum
  date published: 2025-03-20
  track: Uppå vattnets lugna våg (Bacchi Tempel n:o 4)
    type: MusicRecording
    duration: PT7M18S
    duration ms: 438946
    explicit: false
    by artist: William Sundman Sääf
    in album: Uppå Vattnets lugna våg
      type: MusicAlbum
      date published: 2025-03-20
    genre: dark cabaret
    genre: swedish ballads
    isrc code: SE5BU2558752
    additional property: CopyrightID
    additional property: CopyrightStatus
      type: PropertyValue
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    additional property: OTSHash
    additional property: OTSBitcoinBlock
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      type: PropertyValue
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    additional property: OTSVerificationAPI
      type: PropertyValue
      value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5BU2558752
    additional property: OTSTimestamp
      type: PropertyValue
      value: 2026-07-05T10:01:46Z
    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 0xc95d40c3d5fa2f0b6cffd40eb165bffc002a36ff506a1dbd66c21e344f2a23af. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE5BU2558752.
      date published: 2026-07-05T10:01:46Z
    audio: Uppå vattnets lugna våg (Bacchi Tempel n:o 4)
      type: AudioObject
      additional property: Tempo (BPM)
        type: PropertyValue
        value: 116.268
      additional property: Musical Key
        type: PropertyValue
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      additional property: Mode (Major/Minor)
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      additional property: Time Signature
        type: PropertyValue
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      additional property: Danceability
      additional property: Energy
      additional property: Speechiness
      additional property: Acousticness
      additional property: Instrumentalness
      additional property: Liveness
      additional property: Valence (Positivity)
      additional property: Loudness (dB)
      additional property: Key Name
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album: Jag kan dig aldrig förglömma
album: Ett sista glas
album: Ett levnadsöde värre än döden (Acoustic Version)
album: Klackskor på språng
album: Benkvarnen
album: Fattig bonddräng (Live)

Danceability
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value: 0.525

Energy
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value: 0.178

Speechiness
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Acousticness
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value: 0.927

Instrumentalness
type: PropertyValue
value: 0

Liveness
type: PropertyValue
value: 0.084

Valence (Positivity)
type: PropertyValue
value: 0.288

Loudness (dB)
type: PropertyValue
value: -12.25

Key Name
type: PropertyValue
value: C

Mode Name
type: PropertyValue
value: Minor

Jag kan dig aldrig förglömma
type: MusicAlbum
date published: 2025-04-04
track: Gutår båd' natt och dag (Fredmans epistel n:o 1)
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  duration: PT1M27S
  duration ms: 87706
  explicit: false
  by artist: William Sundman Sääf
  in album: Jag kan dig aldrig förglömma
    type: MusicAlbum
    date published: 2025-04-04
  genre: dark cabaret
  genre: swedish ballads
  isrc code: SE5BU2558749
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T22:51:14+00:00
  additional property: CopyrightChainExplorerURL
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  additional property: OTSVerificationAPI
    type: PropertyValue
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  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-06T01:25:57Z
  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 0x1d90630ab8eed0f3bdad0898063aba4ebaf6240ad90e23e9077f7fa04e6a1bf9. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/SE5BU2558749.
    date published: 2026-07-06T01:25:57Z
  audio: Gutår båd' natt och dag (Fredmans epistel n:o 1)
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
      type: PropertyValue
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    additional property: Mode (Major/Minor)
      type: PropertyValue
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    additional property: Time Signature
      type: PropertyValue
      value: 3
    additional property: Danceability
      type: PropertyValue
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    additional property: Energy
      type: PropertyValue
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    additional property: Speechiness
      type: PropertyValue
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    additional property: Acousticness
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    additional property: Instrumentalness
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    additional property: Liveness
      type: PropertyValue
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    additional property: Valence (Positivity)
      type: PropertyValue
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    additional property: Loudness (dB)
      type: PropertyValue
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    additional property: Key Name
      type: PropertyValue
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    additional property: Mode Name
      type: PropertyValue
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track: Ack vad för en usel koja (Fredmans epistel n:o 34)
  type: MusicRecording
  duration: PT4M53S
  duration ms: 293066
  explicit: false
  by artist: William Sundman Sääf
  in album: Jag kan dig aldrig förglömma
    type: MusicAlbum
    date published: 2025-04-04
  genre: dark cabaret
  genre: swedish ballads
  isrc code: SE5BU2558750
  additional property: CopyrightID
  additional property: CopyrightStatus
    type: PropertyValue
    value: registered
  additional property: CopyrightRegisteredAt
    type: PropertyValue
    value: 2026-07-05T14:40:50+00:00
  additional property: CopyrightChainExplorerURL
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    value: https://explorer.copyrightchains.com/tx/0x4dc8b05acb701f9d78e71aa33b0bf5093b6b334b6a5ec99692fead9f047f1ba2
  additional property: OTSHash
  additional property: OTSBitcoinBlock
    type: PropertyValue
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  additional property: OTSBitcoinBlockVerifyURL
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  additional property: OTSVerificationAPI
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  additional property: OTSTimestamp
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  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 0x4dc8b05acb701f9d78e71aa33b0bf5093b6b334b6a5ec99692fead9f047f1ba2. 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/SE5BU2558750.
    date published: 2026-07-05T19:27:56Z
  audio: Ack vad för en usel koja (Fredmans epistel n:o 34)
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    additional property: Danceability
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    additional property: Acousticness
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    additional property: Instrumentalness
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    additional property: Valence (Positivity)
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track: Uppå vattnets lugna våg (Bacchi Tempel n:o 4)
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  by artist: William Sundman Sääf
  in album: Jag kan dig aldrig förglömma
    type: MusicAlbum
    date published: 2025-04-04
  genre: dark cabaret
  genre: swedish ballads
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  additional property: CopyrightID
  additional property: CopyrightStatus
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  additional property: OTSVerificationAPI
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  additional property: OTSVerifyInstructions
  subject of: OpenTimestamps Proof of Existence
  audio: Uppå vattnets lugna våg (Bacchi Tempel n:o 4)
track: Hade jag sextusende daler (Fredmans sånger n:o 14)

OTSBitcoinBlockVerifyURL
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value: https://blockstream.info/api/block-height/956725

OTSVerificationAPI
type: PropertyValue
value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE5BU2558752

OTSTimestamp
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value: 2026-07-05T01:12:41Z

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

OpenTimestamps Proof of Existence
type: DigitalDocument
encoding format: application/vnd.opentimestamps.ots
description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95d40c3d5fa2f0b6cffd40eb165bffc002a36ff506a1dbd66c21e344f2a23af. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/SE5BU2558752.
date published: 2026-07-05T01:12:41Z

Uppå vattnets lugna våg (Bacchi Tempel n:o 4)
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additional property: Tempo (BPM)
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additional property: Musical Key
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additional property: Mode (Major/Minor)
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additional property: Time Signature
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additional property: Danceability
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additional property: Energy
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additional property: Speechiness
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additional property: Acousticness
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additional property: Instrumentalness
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additional property: Liveness
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additional property: Valence (Positivity)
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additional property: Loudness (dB)
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additional property: Key Name
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additional property: Mode Name
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Hade jag sextusende daler (Fredmans sånger n:o 14)
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by artist: William Sundman Sääf
in album: Jag kan dig aldrig förglömma
  type: MusicAlbum
  date published: 2025-04-04
genre: dark cabaret
genre: swedish ballads
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additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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additional property: OTSVerifyInstructions
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  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
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Ett sista glas
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Ett levnadsöde värre än döden (Acoustic Version)
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Klackskor på språng
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Fattig bonddräng (Live)
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