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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ebb07999210f27ec8f20cefc81b69e1105cb71662c5cc843b7e09d4cd01a4d8. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b766046-72d4-4036-92ea-dc2dbacf4057.json and https://artists.proofprofile.net/proofs/artist/2b766046-72d4-4036-92ea-dc2dbacf4057.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Suite For Harpsichord No.7 in G Minor, HWW 432: Passacaille
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d27be4b17b364cafad33a858cbb880cffeaf028b3ea2d5811836b18d12109b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBVVQ0901282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc03f38af7be4aec734c9c2fd086704cc02e7f3b37b653c317673ff85a3f3aef. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBVVQ0901289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47b22796c935765c5a8345301d6865d1f1971309755536e8d8168e63777ac2e. 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/GBVVQ0901290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a970fe2f9dab45cdeccdcdc247cc8c8709083c4e6366ab5f9ed7ae51b50f1b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBVVQ0901295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa6af5288de776a934827c090f244009952f13b0fc6b612b626e3b82748be8a. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBVVQ0901284.
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652cf7705cdf47c05cc333461736a207c1ef85ed577cbd157782135da04d02c3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBVVQ0901294.
Scarlatti y Soler: Music from the Courts of Europe - Madrid
Virginia Black: Keyboard Sonata's & Pieces de clavecin
Rossi, Frescobaldi & Scarlatti: Italian Harpsichord
Piano Sonata No. 11 in A Major, K. 331: III. Alla turca: Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fe65a9e9d77024a5d20ae14f24fafbd75fa5049d0e9f175fcdcb1db19a94a1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFME1447209.
Classical Sonatas for Keyboard and Piano
Sonatas for Harpsichord: Mozart, Rameau & Scarlatti
Virginia Black Performs Domenico Scarlatti, François Couperin & Thomas Arne
Jean-Philippe Rameau: Pieces De Clavecin Suite: Domenico Scarlatti & Thomas Arne: Keyboard Sonatas