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 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 0xec8f78e77365be074a9a71a3dc23e87692e9af32c71fb1f55178ad39da9a0b7f. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d45730b-b00b-4fb9-8c06-b7b758f07718.json and https://artists.proofprofile.net/proofs/artist/8d45730b-b00b-4fb9-8c06-b7b758f07718.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Die Walkure, Act III: Ride of the Valkyries
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 0xbc44b2ef6ab827019013b4ab5f4ccff964448dbc577b12713dfa7dca058f355e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI190706207.
Cello Suite No. 1 in G Major, BWV 1007: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca84baa8763cbd2d39bf023a4c6131185ccd742f12dbfad1d1f7a09a59990d9. 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/HKI190204501.
Hungarian Rhapsody No. 2 in C-Sharp Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ae23573f154339518f8512979901dcd46101beb94d0070d4f96e293ffad87d. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/HKI199841002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a2f17c17bda970f954ec86b1e4930c9354ff5e55d7e2ac336cc17284fb83f6. 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/HKI199220708.
Suite bergamasque, L. 75: III. Clair de lune (Arr for Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f8b4d5d7f1f9191e4bc0cefafbf598c5634c4bc1a84f41c4ad50aaf747c6db. 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/HKI190851902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f9192770574915c7491472dc2c7fd5524f6dafed5677d6c674d89993509b4a. 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/HKI199245311.
Symphony No. 3 in C Minor, Op. 78, "Organ": II. (If I Had Words)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7211775b545d150db35bf2144fd67c796db7e95fd580fb7b0b8a10a75778014. 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/USB8U1014923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e44d6cc39e22c17711ef77453271ba7bd568871dfa180cf95e535398e5b5b82. 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/HKI199692305.
Music for Play per orchestra a plettro: No. 1, Allegro
Orchestra di Mandolini e Chitarre "Città di Brescia"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944756e08a357563e5a9393fea1b7d5187975ee46a8e28eaf9420f2a16b679da. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ITW319902901.
Preludio e fuga per orchestra a plettro: I. Preludio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767385860b8359c625e056ff1771b5f7f218c42e407e003a7a83126b68dec117. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ITW319902907.
Preludio e fuga per orchestra a plettro: II. Fuga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050fe756e64ffb0b975a95c05af66a4d1833d96973df8c6e5fb7ae510e964d5c. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/ITW319902908.
Spaghetti Rag - Rag Music With Mandolins
Raffaele Calace: Le Opere Per Quartetto E Orchestra A Plettro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc88ba31a0a02f11ef202f1c3cc001788620f737bad2c2b6da73b0b50c827da. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/ITE011710548.