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 0xdd2a47b970a28841c8a8c66f163a6a8d8ea19ca767bbc867563c07b18d447222. Chain 2 (Bitcoin): anchored in block 954502 (2026-06-20T05:07:36Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bde3b01-5683-4e6e-9b48-cf8725467481.json and https://artists.proofprofile.net/proofs/artist/9bde3b01-5683-4e6e-9b48-cf8725467481.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Françaix, Schnyder & Others: Chamber Music
Bellini: Concerto für Oboe in E-Flat Major: Maesto e deciso - Larghetto cantabile - Alleggro alla polonese
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 0x1b4c8dc532bf632d3084da727bdacc805cd510fe440661ff5b8335e07840d08a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEA340800116.
"Ricordo di Napol" für Oboe und Streicher
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38720939931c1eefc080646c0688fece4a0f79b36d3ece74c2c5e77f89983cf8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEA340800118.
Fantasia Italiana & excl. Track "Le Api"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1383bd2db41e10ae003958b0b11752d84629b2dae1be527f153deda0bd90df07. 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/GBAYC9401206.
Gloria in D Major, RV 589: I. Gloria in excelsis Deo (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8787e92513b95813a20c0e1d2e8448316c30a737d73468cd5cb3e3f9b1ef13. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBAYC9200663.
Orchestre de chambre Jean-François Paillard
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1638f4b479cdc7557a231208a5dc076cfb64214bc4cc69099af195adfaf00c9c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ206800200.
Zadok the Priest, HWV 258: Zadok the Priest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078de273d45912da0da6005826149da6cf50dceb60a5f482d2ee1db0b5e802cb. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBAYC0102057.
Cantata No. 51, BWV. 51: Aria, Jauchzet Gott in allen Landen!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3fd2e23ebef579bed8bc596f6d0504419c5e33b25b76e919da11f05c51f30e. 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/GBAYC9301023.
Concerto for 2 Mandolins in G Major, RV 532: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1e7495d20a6513854de0eb39391eac041aa7c0a28a7633c3c5771251cb346a6. 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/GBAYC0103446.
Ensemble Berlin: Weber, Pasculli & Beethoven