Carolina Sandgren
type: MusicGroup
genre: opera
popularity: 2
followers: 12
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
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additional property: OTSProofURL
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additional property: OTSRecordURL
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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 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
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2257b9e40e103124dc0b60cfb1076a2711a96504e99da2e13033a6ee6d3238f. Chain 2 (Bitcoin): anchored in block 953933 (2026-06-16T11:13:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ffd0f75-3e5c-4fae-b141-d96521300803.json and https://artists.proofprofile.net/proofs/artist/1ffd0f75-3e5c-4fae-b141-d96521300803.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T11:13:24Z
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track: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": Veni, creator spiritus -
  type: MusicRecording
  duration: PT1M21S
  duration ms: 81720
  explicit: false
  by artist: Gustav Mahler
  by artist: Ulla Gustafsson
  by artist: MariAnne Häggander
  by artist: Carolina Sandgren
  by artist: Ulrika Tenstam
  by artist: Anne Gjevang
  by artist: Seppo Ruohonen
  by artist: Mats Persson
  by artist: Johann Tilli
  by artist: Brunnsbo Music Classes Children's Choir
  by artist: Estonian Boys' Choir
  by artist: Gothenburg Opera Chorus
  by artist: Gothenburg Symphony Chorus
  by artist: Stockholm Royal Philharmonic Choir
  by artist: Gothenburg Opera Orchestra
  by artist: Göttinger Symphonie Orchester
  by artist: Neeme Järvi
  in album: Mahler: Symphony No. 8
    type: MusicAlbum
    date published: 1995-01-31
  popularity: 5
  genre: classical
  genre: orchestra
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  additional property: OTSVerificationAPI
    type: PropertyValue
    value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEAEH9400010
  additional property: OTSTimestamp
    type: PropertyValue
    value: 2026-07-29T22:13:32Z
  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
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    description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x496c323ca8b729c385385a23af16820efcc3a3ed222f320ccfa6b40dc6aae453. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/SEAEH9400010.
    date published: 2026-07-29T22:13:32Z
  audio: Symphony No. 8 in E-Flat Major "Symphony of a Thousand": Veni, creator spiritus -
    type: AudioObject
    additional property: Tempo (BPM)
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    additional property: Musical Key
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    additional property: Danceability
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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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