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type: MusicGroup
genre: opera
popularity: 6
followers: 3
additional property: CopyrightID
additional property: CopyrightChainExplorerURL
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additional property: OTSVerificationAPI
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additional property: OTSVerifyInstructions
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  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
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  date published: 2026-06-17T08:11:48Z
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track: Les Contes d'Hoffmann / Prologue: "Va pour Kleinzach...Il était une fois à la cour"
track: Les Contes d'Hoffmann / Act 1: Voici les valseurs!
track: Les Contes d'Hoffmann / Prologue: Il était une fois à la cour d'Eisenach
track: Les Contes d'Hoffmann / Act 2: Belle nuit, ô nuit d'amour
track: Les Contes d'Hoffmann / Prologue: Allons, allons mes enfants! Préparez cette salle
track: Les Contes d'Hoffmann / Act 2: Amis! Amour tendre et rêveur
track: Les Contes d'Hoffmann / Act 1: Les oiseaux dans la charmille

Les Contes d'Hoffmann / Prologue: "Va pour Kleinzach...Il était une fois à la cour"
type: MusicRecording
duration: PT5M31S
duration ms: 331226
explicit: false
by artist: Jacques Offenbach
by artist: Plácido Domingo
by artist: Pedro Di Proenza
by artist: Choeur de la Radio Suisse Romande
by artist: Pro Arte Choir, Lausanne
by artist: Choeur Du Brassus
by artist: Orchestre de la Suisse Romande
by artist: Richard Bonynge
in album: Offenbach: Les Contes d'Hoffmann - Highlights
  type: MusicAlbum
  date published: 1972-01-01
genre: classical
genre: german-romanticism
genre: late-romantic-era
genre: french-opera
genre: french-romanticism
genre: operetta
isrc code: GBF077140502
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
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additional property: CopyrightRegisteredAt
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  value: 2026-06-25T19:04:25+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSVerificationAPI
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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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab885c6d9c3641ae24b2e3085763a5fc922c930b897d7f010001f8202984472. 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/GBF077140502.
  date published: 2026-07-02T03:55:08Z
audio: Les Contes d'Hoffmann / Prologue: "Va pour Kleinzach...Il était une fois à la cour"
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  additional property: Tempo (BPM)
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  additional property: Musical Key
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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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Les Contes d'Hoffmann / Act 1: Voici les valseurs!
type: MusicRecording
duration: PT5M10S
duration ms: 310000
explicit: false
by artist: Jacques Offenbach
by artist: Dame Joan Sutherland
by artist: Hugues Cuénod
by artist: Huguette Tourangeau
by artist: Plácido Domingo
by artist: Jacques Charon
by artist: Pro Arte Choir, Lausanne
by artist: Choeur Du Brassus
by artist: Choeur de la Radio Suisse Romande
by artist: Orchestre de la Suisse Romande
by artist: Richard Bonynge
in album: Offenbach: Les Contes d'Hoffmann - Highlights
  type: MusicAlbum
  date published: 1972-01-01
genre: classical
genre: german-romanticism
genre: late-romantic-era
genre: french-opera
genre: french-romanticism
genre: operetta
isrc code: GBF077240016
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additional property: CopyrightStatus
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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  value: 2026-07-06T06:56:49+00:00
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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-06T07:53:57Z
audio: Les Contes d'Hoffmann / Act 1: Voici les valseurs!
  type: AudioObject
  additional property: Tempo (BPM)
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  additional property: Valence (Positivity)
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Les Contes d'Hoffmann / Prologue: Il était une fois à la cour d'Eisenach
type: MusicRecording
duration: PT5M29S
duration ms: 329266
explicit: false
by artist: Jacques Offenbach
by artist: Plácido Domingo
by artist: Pedro Di Proenza
by artist: Orchestre de la Suisse Romande
by artist: Richard Bonynge
by artist: Pro Arte Choir, Lausanne
by artist: Choeur Du Brassus
by artist: Choeur de la Radio Suisse Romande
in album: Offenbach: Les Contes d'Hoffman
  type: MusicAlbum
  date published: 1972-01-01
genre: classical
genre: german-romanticism
genre: late-romantic-era
genre: french-opera
genre: french-romanticism
genre: operetta
isrc code: GBF077240005
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077240005
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-08T03:20:19+00:00
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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-08T03:22:41Z
audio: Les Contes d'Hoffmann / Prologue: Il était une fois à la cour d'Eisenach
  type: AudioObject
  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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Les Contes d'Hoffmann / Act 2: Belle nuit, ô nuit d'amour
type: MusicRecording
duration: PT4M51S
duration ms: 291133
explicit: false
by artist: Jacques Offenbach
by artist: Dame Joan Sutherland
by artist: Huguette Tourangeau
by artist: Plácido Domingo
by artist: Andre Neury
by artist: Pro Arte Choir, Lausanne
by artist: Choeur Du Brassus
by artist: Choeur de la Radio Suisse Romande
by artist: Orchestre de la Suisse Romande
by artist: Richard Bonynge
in album: Offenbach: Les Contes d'Hoffman
  type: MusicAlbum
  date published: 1972-01-01
genre: classical
genre: german-romanticism
genre: late-romantic-era
genre: french-opera
genre: french-romanticism
genre: operetta
isrc code: GBF077240017
additional property: CopyrightID
additional property: CopyrightStatus
  type: PropertyValue
  value: registered
additional property: CopyrightRegisteredAt
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  value: 2026-07-06T08:58:04+00:00
additional property: CopyrightChainExplorerURL
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-07T15:12:44+00:00
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
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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additional property: ContentHash
additional property: BitcoinBlock
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additional property: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  date published: 2026-07-07T15:15:30Z
audio: Les Contes d'Hoffmann / Act 2: Belle nuit, ô nuit d'amour
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Les Contes d'Hoffmann / Prologue: Allons, allons mes enfants! Préparez cette salle
type: MusicRecording
duration: PT2M43S
duration ms: 163600
explicit: false
by artist: Jacques Offenbach
by artist: Pedro Di Proenza
by artist: Paul Guigue
by artist: Roland Jacques
by artist: Choeur de la Radio Suisse Romande
by artist: Pro Arte Choir, Lausanne
by artist: Choeur Du Brassus
by artist: Orchestre de la Suisse Romande
by artist: Richard Bonynge
in album: Offenbach: Les Contes d'Hoffmann - Highlights
  type: MusicAlbum
  date published: 1972-01-01
genre: classical
genre: german-romanticism
genre: late-romantic-era
genre: french-opera
genre: french-romanticism
genre: operetta
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6efff7abb918974ca428d54ebcb0d67f4587926f2eaddb63c21f8524b9b1ea07. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/GBF077240003.
  date published: 2026-07-29T13:09:35Z
audio: Les Contes d'Hoffmann / Prologue: Allons, allons mes enfants! Préparez cette salle
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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 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

Les Contes d'Hoffmann / Act 2: Amis! Amour tendre et rêveur
type: MusicRecording
duration: PT2M28S
duration ms: 148600
explicit: false
by artist: Jacques Offenbach
by artist: Plácido Domingo
by artist: Dame Joan Sutherland
by artist: Hugues Cuénod
by artist: Andre Neury
by artist: Jean Valaisan
by artist: Pro Arte Choir, Lausanne
by artist: Choeur Du Brassus
by artist: Choeur de la Radio Suisse Romande
by artist: Orchestre de la Suisse Romande
by artist: Richard Bonynge
in album: Offenbach: Les Contes d'Hoffmann - Highlights
  type: MusicAlbum
  date published: 1972-01-01
genre: classical
genre: german-romanticism
genre: late-romantic-era
genre: french-opera
genre: french-romanticism
genre: operetta
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e58c96cff1408e9b4f7f7392f21310df733fd506af5b5ce471b67b72b67aeb. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/GBF077240018.
  date published: 2026-07-30T02:37:10Z
audio: Les Contes d'Hoffmann / Act 2: Amis! Amour tendre et rêveur
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 125.485
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.426
  additional property: Energy
    type: PropertyValue
    value: 0.521
  additional property: Speechiness
    type: PropertyValue
    value: 0.069
  additional property: Acousticness
    type: PropertyValue
    value: 0.953
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.104
  additional property: Liveness
    type: PropertyValue
    value: 0.755
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.604
  additional property: Loudness (dB)
    type: PropertyValue
    value: -13.67
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: GBF077240018
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960200
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-30T02:37:10+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077240018
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960200
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960200
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-30T02:37:10+00:00
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

Les Contes d'Hoffmann / Act 1: Les oiseaux dans la charmille
type: MusicRecording
duration: PT7M11S
duration ms: 431066
explicit: false
by artist: Jacques Offenbach
by artist: Dame Joan Sutherland
by artist: Hugues Cuénod
by artist: Huguette Tourangeau
by artist: Plácido Domingo
by artist: Jacques Charon
by artist: Pro Arte Choir, Lausanne
by artist: Choeur Du Brassus
by artist: Choeur de la Radio Suisse Romande
by artist: Orchestre de la Suisse Romande
by artist: Richard Bonynge
in album: Offenbach: Les Contes d'Hoffman
  type: MusicAlbum
  date published: 1972-01-01
genre: classical
genre: german-romanticism
genre: late-romantic-era
genre: french-opera
genre: french-romanticism
genre: operetta
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2c804d531b9a62048def3a48cd1328e7570fb23463129ebd71fa64d56224c4. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/GBF077240013.
  date published: 2026-07-31T20:22:46Z
audio: Les Contes d'Hoffmann / Act 1: Les oiseaux dans la charmille
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 94.356
  additional property: Musical Key
    type: PropertyValue
    value: 8
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.338
  additional property: Energy
    type: PropertyValue
    value: 0.125
  additional property: Speechiness
    type: PropertyValue
    value: 0.129
  additional property: Acousticness
    type: PropertyValue
    value: 0.948
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.001
  additional property: Liveness
    type: PropertyValue
    value: 0.106
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.162
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.838
  additional property: Key Name
    type: PropertyValue
    value: Ab
  additional property: Mode Name
    type: PropertyValue
    value: Major
isrc code: GBF077240013
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
  type: PropertyValue
  value: verified-cc-db-prod
additional property: TokenDeploymentConfirmed
  type: PropertyValue
  value: true
additional property: ContentHash
additional property: BitcoinBlock
  type: PropertyValue
  value: 960459
additional property: BitcoinTime
  type: PropertyValue
  value: 2026-07-31T20:22:46+00:00
additional property: OTSVerificationAPI
  type: PropertyValue
  value: https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077240013
additional property: OTSHash
additional property: OTSBitcoinBlock
  type: PropertyValue
  value: 960459
additional property: OTSBitcoinBlockVerifyURL
  type: PropertyValue
  value: https://blockstream.info/api/block-height/960459
additional property: OTSTimestamp
  type: PropertyValue
  value: 2026-07-31T20:22:46+00:00
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