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type: MusicGroup
popularity: 3
followers: 9
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additional property: CopyrightChainExplorerURL
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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 0xb9212cd10dba4f41b5f65af124f29feb51a58fdda1a4ee9a3b24d5a8bd0ccb3f. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ba4710d-d367-4a9c-84ad-d3914a246ae7.json and https://artists.proofprofile.net/proofs/artist/8ba4710d-d367-4a9c-84ad-d3914a246ae7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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track: Horn Concerto No. 2 in D Major, MH 53: I. Allegro moderato
track: Concertino per il Corno e Trombone, MH 86: I. Adagio
track: Concertino per il Corno e Trombone, MH 86: II. Allegro molto
track: Horn Concerto in D Major, MH 134: I. Larghetto

Horn Concerto No. 2 in D Major, MH 53: I. Allegro moderato
type: MusicRecording
duration: PT6M25S
duration ms: 385933
explicit: false
by artist: Michael Haydn
by artist: Martin Petrak
by artist: Haydn Ensemble Prague
by artist: Přemysl Vojta
in album: Michael & Joseph Haydn: Horn Concertos
  type: MusicAlbum
  date published: 2018-11-09
isrc code: DEAQ71814601
additional property: CopyrightID
additional property: CopyrightStatus
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additional property: OTSTimestamp
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  value: 2026-07-08T03:22:41+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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  value: 2026-07-08T03:22:41+00:00
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a9c12326b352862c4f09bc50150a4e9eb134c19f6e8da8a477530617e77a51. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEAQ71814601.
  date published: 2026-07-08T03:39:04Z
audio: Horn Concerto No. 2 in D Major, MH 53: I. Allegro moderato
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  additional property: Tempo (BPM)
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    type: PropertyValue
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  additional property: Valence (Positivity)
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Concertino per il Corno e Trombone, MH 86: I. Adagio
type: MusicRecording
duration: PT7M57S
duration ms: 477320
explicit: false
by artist: Michael Haydn
by artist: Martin Petrak
by artist: Fabrice Millischer
by artist: Haydn Ensemble Prague
by artist: Přemysl Vojta
in album: Michael & Joseph Haydn: Horn Concertos
  type: MusicAlbum
  date published: 2018-11-09
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42387d55bbeb6e1a419571a2f8841829905cdc9a11832d057012d91b3d4c7543. 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/DEAQ71814604.
  date published: 2026-07-31T20:22:46Z
audio: Concertino per il Corno e Trombone, MH 86: I. Adagio
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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

Concertino per il Corno e Trombone, MH 86: II. Allegro molto
type: MusicRecording
duration: PT6M56S
duration ms: 416773
explicit: false
by artist: Michael Haydn
by artist: Přemysl Vojta
by artist: Fabrice Millischer
by artist: Haydn Ensemble Prague
by artist: Martin Petrak
in album: Michael & Joseph Haydn: Horn Concertos
  type: MusicAlbum
  date published: 2018-11-09
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f423da4fa555371a3afaf168226dd1d522d390ed8ed0c78db60c106ba241b1. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEAQ71814605.
  date published: 2026-07-31T16:33:26Z
audio: Concertino per il Corno e Trombone, MH 86: II. Allegro molto
  type: AudioObject
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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

Horn Concerto in D Major, MH 134: I. Larghetto
type: MusicRecording
duration: PT6M45S
duration ms: 405426
explicit: false
by artist: Michael Haydn
by artist: Haydn Ensemble Prague
by artist: Přemysl Vojta
by artist: Martin Petrak
in album: Michael & Joseph Haydn: Horn Concertos
  type: MusicAlbum
  date published: 2018-11-09
subject of: OpenTimestamps Proof of Existence
  type: DigitalDocument
  encoding format: application/vnd.opentimestamps.ots
  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364a1402865a9dc3dd8ba8cc33d1c603737e2237fe0e64a63de9bd445feb5cfd. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEAQ71814606.
  date published: 2026-07-31T17:29:52Z
audio: Horn Concerto in D Major, MH 134: I. Larghetto
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isrc code: DEAQ71814606
additional property: CopyrightID
additional property: ProofProfileEvidenceStatus
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additional property: TokenDeploymentConfirmed
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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