The Four Nations Ensemble
type: MusicGroup
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followers: 114
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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 0x389c0f2cd546c65df27cb954e03cda8c22fd19ddc756782f2a8d4fa85cf0aa1a. Chain 2 (Bitcoin): anchored in block 953999 (2026-06-16T20:20:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/315bb910-2277-4455-8358-e128b9ce8832.json and https://artists.proofprofile.net/proofs/artist/315bb910-2277-4455-8358-e128b9ce8832.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
  date published: 2026-06-16T20:20:58Z
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album: Handel / Vivaldi: Cantatas and Sonatas
  type: MusicAlbum
  date published: 2000-01-01
  track: Sonata in D minor for 2 violins and continuo, Op. 1 No. 12, RV63 La Follia

Sonata in D minor for 2 violins and continuo, Op. 1 No. 12, RV63 La Follia
type: MusicRecording
duration: PT9M26S
duration ms: 566733
explicit: false
by artist: Antonio Vivaldi
by artist: The Four Nations Ensemble
by artist: Matthew White
in album: Handel / Vivaldi: Cantatas and Sonatas
  type: MusicAlbum
  date published: 2000-01-01
popularity: 0
isrc code: GBUM70904266
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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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subject of: OpenTimestamps Proof of Existence
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  description: Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110c325df42a682489343fa049318e26aeb4e1bbd4b58f4e6bf40402ea162f03. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBUM70904266.
  date published: 2026-07-06T07:53:57Z
audio: Sonata in D minor for 2 violins and continuo, Op. 1 No. 12, RV63 La Follia
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  additional property: Key Name
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