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type: MusicGroup
genre: jazz
popularity: 5
followers: 18
additional property: CopyrightID
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: OTSProofURL
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additional property: OTSRecordURL
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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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b7dbaca57138258186a9614647476d0569306717f3d1a6fed6489cec44dd63. Chain 2 (Bitcoin): anchored in block 953941 (2026-06-16T11:51:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/21707cb9-fbfa-4805-bed0-9cb1ebc947c4.json and https://artists.proofprofile.net/proofs/artist/21707cb9-fbfa-4805-bed0-9cb1ebc947c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T11:51:19Z
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track: A Salute to the Count (The Basie Band Is Back in Town) [Arr. Chris Brubeck]
track: Four Score in Seven
track: Brandenburg Gate, Revisited (Arr. Howard Brubeck)
track: Take Five (Arr. Russell Gloyd)
track: Summer Music (Arr. Darius Brubeck)
track: In Your Own Sweet Way (Arr. Howard Brubeck)
track: Chorale
track: Blue Rondo À La Turk (Arr. Darius Brubeck)
track: Unsquare Dance (Arr. Chris Brubeck)

A Salute to the Count (The Basie Band Is Back in Town) [Arr. Chris Brubeck]
type: MusicRecording
duration: PT7M45S
duration ms: 465106
explicit: false
by artist: London Symphony Orchestra
by artist: Russell Gloyd
by artist: Dave Brubeck
by artist: Darius Brubeck
by artist: Chris Brubeck
by artist: Matthew Brubeck
by artist: Dan Brubeck
in album: Dave Brubeck: Live with the LSO (feat. Darius Brubeck, Chris Brubeck, Matthew Brubeck, Dan Brubeck, Bobby Militello & Alec Dankworth)
  type: MusicAlbum
  date published: 2001-10-08
genre: classical
genre: opera
genre: orchestra
genre: british-orchestra
genre: orchestral
genre: ballet
isrc code: GBDGQ0001103
additional property: CopyrightID
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additional property: CopyrightRegisteredAt
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additional property: OTSVerificationAPI
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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
  type: DigitalDocument
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  date published: 2026-07-08T03:53:27Z
audio: A Salute to the Count (The Basie Band Is Back in Town) [Arr. Chris Brubeck]
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  additional property: Danceability
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Four Score in Seven
type: MusicRecording
duration: PT7M31S
duration ms: 451480
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by artist: London Symphony Orchestra
by artist: Russell Gloyd
by artist: Dave Brubeck
by artist: Darius Brubeck
by artist: Chris Brubeck
by artist: Matthew Brubeck
by artist: Dan Brubeck
in album: Dave Brubeck: Live with the LSO (feat. Darius Brubeck, Chris Brubeck, Matthew Brubeck, Dan Brubeck, Bobby Militello & Alec Dankworth)
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genre: classical
genre: opera
genre: orchestra
genre: british-orchestra
genre: orchestral
genre: ballet
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additional property: OTSVerificationAPI
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additional property: OTSTimestamp
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additional property: OTSVerifyInstructions
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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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2885298c3e28deef5ee7e45ad34ab3e67d30f4306a5a1a360ae6a342fec9d20d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBDGQ0001106.
  date published: 2026-07-08T03:53:27Z
audio: Four Score in Seven
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Brandenburg Gate, Revisited (Arr. Howard Brubeck)
type: MusicRecording
duration: PT15M50S
duration ms: 950333
explicit: false
by artist: London Symphony Orchestra
by artist: Russell Gloyd
by artist: Dave Brubeck
by artist: Darius Brubeck
by artist: Chris Brubeck
by artist: Matthew Brubeck
by artist: Dan Brubeck
in album: Dave Brubeck: Live with the LSO (feat. Darius Brubeck, Chris Brubeck, Matthew Brubeck, Dan Brubeck, Bobby Militello & Alec Dankworth)
  type: MusicAlbum
  date published: 2001-10-08
genre: classical
genre: opera
genre: orchestra
genre: british-orchestra
genre: orchestral
genre: ballet
isrc code: GBDGQ0001107
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: CopyrightRegisteredAt
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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
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: 2026-07-08T03:53:27Z
audio: Brandenburg Gate, Revisited (Arr. Howard Brubeck)
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  additional property: Tempo (BPM)
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Take Five (Arr. Russell Gloyd)
type: MusicRecording
duration: PT9M22S
duration ms: 562666
explicit: false
by artist: London Symphony Orchestra
by artist: Russell Gloyd
by artist: Dave Brubeck
by artist: Darius Brubeck
by artist: Chris Brubeck
by artist: Matthew Brubeck
by artist: Dan Brubeck
in album: Dave Brubeck: Live with the LSO (feat. Darius Brubeck, Chris Brubeck, Matthew Brubeck, Dan Brubeck, Bobby Militello & Alec Dankworth)
  type: MusicAlbum
  date published: 2001-10-08
genre: classical
genre: opera
genre: orchestra
genre: british-orchestra
genre: orchestral
genre: ballet
isrc code: GBDGQ0001108
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSVerificationAPI
  type: PropertyValue
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additional property: OTSTimestamp
  type: PropertyValue
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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
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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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6dad74b40b3037812a9e7eb2e92f1785894680040abe05d1bfb6273588c778. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBDGQ0001108.
  date published: 2026-07-08T03:20:19Z
audio: Take Five (Arr. Russell Gloyd)
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Summer Music (Arr. Darius Brubeck)
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duration: PT6M35S
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explicit: false
by artist: London Symphony Orchestra
by artist: Russell Gloyd
by artist: Dave Brubeck
by artist: Darius Brubeck
by artist: Chris Brubeck
by artist: Matthew Brubeck
by artist: Dan Brubeck
in album: Dave Brubeck: Live with the LSO (feat. Darius Brubeck, Chris Brubeck, Matthew Brubeck, Dan Brubeck, Bobby Militello & Alec Dankworth)
  type: MusicAlbum
  date published: 2001-10-08
genre: classical
genre: opera
genre: orchestra
genre: british-orchestra
genre: orchestral
genre: ballet
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d338ee06291ec768e8c7737d77142c62fbc6e3d7a1f097ff7484a0b675c51a. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBDGQ0001101.
  date published: 2026-07-31T12:24:41Z
audio: Summer Music (Arr. Darius Brubeck)
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additional property: OTSTimestamp
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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 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

In Your Own Sweet Way (Arr. Howard Brubeck)
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by artist: London Symphony Orchestra
by artist: Russell Gloyd
by artist: Dave Brubeck
by artist: Darius Brubeck
by artist: Chris Brubeck
by artist: Matthew Brubeck
by artist: Dan Brubeck
in album: Dave Brubeck: Live with the LSO (feat. Darius Brubeck, Chris Brubeck, Matthew Brubeck, Dan Brubeck, Bobby Militello & Alec Dankworth)
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  date published: 2001-10-08
genre: classical
genre: opera
genre: orchestra
genre: british-orchestra
genre: orchestral
genre: ballet
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c76f83bd8721c49573fb35bbe7322f396c3014ba34a3a4641fee437866c80e6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBDGQ0001102.
  date published: 2026-07-31T00:26:26Z
audio: In Your Own Sweet Way (Arr. Howard Brubeck)
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  additional property: Liveness
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isrc code: GBDGQ0001102
additional property: CopyrightID
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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additional property: OTSVerificationAPI
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additional property: OTSHash
additional property: OTSBitcoinBlock
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additional property: OTSBitcoinBlockVerifyURL
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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 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

Chorale
type: MusicRecording
duration: PT10M36S
duration ms: 636413
explicit: false
by artist: London Symphony Orchestra
by artist: Russell Gloyd
by artist: Dave Brubeck
by artist: Darius Brubeck
by artist: Chris Brubeck
by artist: Matthew Brubeck
by artist: Dan Brubeck
in album: Dave Brubeck: Live with the LSO (feat. Darius Brubeck, Chris Brubeck, Matthew Brubeck, Dan Brubeck, Bobby Militello & Alec Dankworth)
  type: MusicAlbum
  date published: 2001-10-08
genre: classical
genre: opera
genre: orchestra
genre: british-orchestra
genre: orchestral
genre: ballet
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cad3d20d43cf2e964f44bbeb3580e2a2d60dbfbb50f2ba342fa8908e518ee37. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBDGQ0001104.
  date published: 2026-07-31T18:48:12Z
audio: Chorale
  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: Acousticness
    type: PropertyValue
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  additional property: Instrumentalness
    type: PropertyValue
    value: 0.888
  additional property: Liveness
    type: PropertyValue
    value: 0.663
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.035
  additional property: Loudness (dB)
    type: PropertyValue
    value: -28.422
  additional property: Key Name
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isrc code: GBDGQ0001104
additional property: CopyrightID
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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additional property: OTSVerificationAPI
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additional property: OTSBitcoinBlockVerifyURL
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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 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

Blue Rondo À La Turk (Arr. Darius Brubeck)
type: MusicRecording
duration: PT6M26S
duration ms: 386000
explicit: false
by artist: London Symphony Orchestra
by artist: Russell Gloyd
by artist: Dave Brubeck
by artist: Darius Brubeck
by artist: Chris Brubeck
by artist: Matthew Brubeck
by artist: Dan Brubeck
in album: Dave Brubeck: Live with the LSO (feat. Darius Brubeck, Chris Brubeck, Matthew Brubeck, Dan Brubeck, Bobby Militello & Alec Dankworth)
  type: MusicAlbum
  date published: 2001-10-08
genre: classical
genre: opera
genre: orchestra
genre: british-orchestra
genre: orchestral
genre: ballet
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e37f298bca1e5ffdf35634e6e8fe382ba9b6aa207550357be8350fb9299ac7f. 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/GBDGQ0001105.
  date published: 2026-07-29T22:13:32Z
audio: Blue Rondo À La Turk (Arr. Darius Brubeck)
  type: AudioObject
  additional property: Tempo (BPM)
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    value: 112.438
  additional property: Musical Key
    type: PropertyValue
    value: 5
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 1
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.378
  additional property: Energy
    type: PropertyValue
    value: 0.45
  additional property: Speechiness
    type: PropertyValue
    value: 0.044
  additional property: Acousticness
    type: PropertyValue
    value: 0.717
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.656
  additional property: Liveness
    type: PropertyValue
    value: 0.711
  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.434
  additional property: Loudness (dB)
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isrc code: GBDGQ0001105
additional property: CopyrightID
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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additional property: OTSVerificationAPI
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additional property: OTSBitcoinBlockVerifyURL
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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 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

Unsquare Dance (Arr. Chris Brubeck)
type: MusicRecording
duration: PT4M18S
duration ms: 258013
explicit: false
by artist: London Symphony Orchestra
by artist: Russell Gloyd
by artist: Dave Brubeck
by artist: Darius Brubeck
by artist: Chris Brubeck
by artist: Matthew Brubeck
by artist: Dan Brubeck
in album: Dave Brubeck: Live with the LSO (feat. Darius Brubeck, Chris Brubeck, Matthew Brubeck, Dan Brubeck, Bobby Militello & Alec Dankworth)
  type: MusicAlbum
  date published: 2001-10-08
genre: classical
genre: opera
genre: orchestra
genre: british-orchestra
genre: orchestral
genre: ballet
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6226c8ff1c428c24d3f7a53839e17bf4a258a138f4bac3335bbf3b9b17672cb3. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/GBDGQ0001109.
  date published: 2026-07-30T07:28:30Z
audio: Unsquare Dance (Arr. Chris Brubeck)
  type: AudioObject
  additional property: Tempo (BPM)
    type: PropertyValue
    value: 125.714
  additional property: Musical Key
    type: PropertyValue
    value: 9
  additional property: Mode (Major/Minor)
    type: PropertyValue
    value: 0
  additional property: Time Signature
    type: PropertyValue
    value: 5
  additional property: Danceability
    type: PropertyValue
    value: 0.722
  additional property: Energy
    type: PropertyValue
    value: 0.647
  additional property: Speechiness
    type: PropertyValue
    value: 0.067
  additional property: Acousticness
    type: PropertyValue
    value: 0.701
  additional property: Instrumentalness
    type: PropertyValue
    value: 0.765
  additional property: Liveness
    type: PropertyValue
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  additional property: Valence (Positivity)
    type: PropertyValue
    value: 0.539
  additional property: Loudness (dB)
    type: PropertyValue
    value: -20.763
  additional property: Key Name
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    value: A
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    value: Minor
isrc code: GBDGQ0001109
additional property: CopyrightID
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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additional property: OTSVerificationAPI
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additional property: OTSBitcoinBlockVerifyURL
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additional property: OTSTimestamp
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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 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