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followers: 2
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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: 2026-06-21T11:50:32Z
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track: Serenade for Strings No. 13 in G Major, KV 525: II. Romanze. Andante

Serenade for Strings No. 13 in G Major, KV 525: II. Romanze. Andante
type: MusicRecording
duration: PT6M34S
duration ms: 394773
explicit: false
by artist: Wolfgang Amadeus Mozart
by artist: Alexander Permovaisky
by artist: Herbert Paumgartner
by artist: Camerata Academia Salzburg
in album: Mozart - Violin Concerti 3 & 4
  type: MusicAlbum
  date published: 2014-10-13
genre: classical
genre: classical-era
isrc code: USV351461754
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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: BitcoinTime
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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6ba9a03c6f47763878f2cf94c2341c4ec25cc0c7e7b83e81c70f6f14073eb6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USV351461754.
  date published: 2026-06-13T15:41:10Z
audio: Serenade for Strings No. 13 in G Major, KV 525: II. Romanze. Andante
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  additional property: Key Name
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