Philharmonia Orchestra & Sir Charles Mackerras
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genre: orchestra
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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: Overture to A Midsummer Night's Dream, Op.21
track: Symphony No.6 in B minor, Op.74, 'Pathétique': i. Adagio – Allegro non troppo

Overture to A Midsummer Night's Dream, Op.21
type: MusicRecording
duration: PT12M4S
duration ms: 724600
explicit: false
by artist: Felix Mendelssohn
by artist: Philharmonia Orchestra & Sir Charles Mackerras
by artist: Sir Charles Mackerras
by artist: Philharmonia Orchestra
in album: Tchaikovsky: Symphony No. 6 / Mendelssohn: Overture to a Midsummer Night's Dream
  type: MusicAlbum
  date published: 2011-05-27
genre: classical
genre: early-romantic-era
genre: german-romanticism
isrc code: GBLLH1125305
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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
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcae0b35360d95356bfbe8393293b810e934408fd94296a5f3859ca72c87cedbc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBLLH1125305.
  date published: 2026-07-02T05:09:12Z
audio: Overture to A Midsummer Night's Dream, Op.21
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Symphony No.6 in B minor, Op.74, 'Pathétique': i. Adagio – Allegro non troppo
type: MusicRecording
duration: PT18M39S
duration ms: 1119240
explicit: false
by artist: Pyotr Ilyich Tchaikovsky
by artist: Philharmonia Orchestra & Sir Charles Mackerras
by artist: Sir Charles Mackerras
by artist: Philharmonia Orchestra
in album: Tchaikovsky: Symphony No. 6 / Mendelssohn: Overture to a Midsummer Night's Dream
  type: MusicAlbum
  date published: 2011-05-27
subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec78640906857b29e99a433f965da8921cffbe7f1db3bf8ef63ee7f298ce6642. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBLLH1125301.
  date published: 2026-07-31T21:25:57Z
audio: Symphony No.6 in B minor, Op.74, 'Pathétique': i. Adagio – Allegro non troppo
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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