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 0xee7bdfbdd7eca070f432f32cc2d20a4c129074f0d4871d2486bc108b69cc6200. Chain 2 (Bitcoin): anchored in block 954615 (2026-06-20T22:44:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5ed37e4-3aec-4fd5-9ad1-0e48314082a6.json and https://artists.proofprofile.net/proofs/artist/c5ed37e4-3aec-4fd5-9ad1-0e48314082a6.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Kuando el Rey Nimrod (Avram Avinu) (Arr. Jeannette Sorrell)
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 0x18cdeeb17ed0757741218a5d629cd3dc7417412729a9856d7d2d1f36cbaeb2c3. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1606149 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fa9e684043057194028f41bf7bf391a2cc08e9cfb3b29aea9b51157641f4c9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1606150 — a six-check JSON result.
A la una yo nací (Arr. Jeannette Sorrell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432517bc43dbef20459dd6a459621fe415759e830dce199920e8101bd49ee94b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1606159 — a six-check JSON result.
Ir me kero, Madre, a Yerushalayim (Arr. Jeannette Sorrell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33173611a24edb8dcc5220e5f41fd4df0cb68b6adb2b1b82c8f425dc5cfc1ca. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1606148 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b55f53fe7777b6dce5666fad6809809b8fd7a01123c456a49642ff2ab0921ec. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1606151 — a six-check JSON result.
Ki eshmera Shabbat (Arr. Jeannette Sorrell, Jeffrey Strauss, Rene Schiffer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9492718bed64eabd676533ee1c6dbbe5cadc004f7caa180427fd56762c771698. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1606160 — a six-check JSON result.
Tzur mishelo akhalnu (Arr. Jeannette Sorrell)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c85f9372cbbd47b3527d353b418e9935a92a9cee8f8fecad85c1b9117e62a92. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1606163 — a six-check JSON result.
St. John Passion, BWV 245 Pt. 2: XVI. Da fürheten sie Jesum von Kaiphas – Wäre dieser nicht ein Übeltäter – Da sprach Pilatus – Wir dürfen niemand töten – Auf daß erfüllet würde (Recitative)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2673f65e6990162708c7be5f673b3731f393022f032a13e3fc3ee4bc005eb05f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1706424 — a six-check JSON result.
St. John Passion, BWV 245 Pt. 2: XXI. Und die Kriegsknechte flochten eine Krone – Sei gegrüßet, lieber Jüdenkönig! – Und gaben ihm Backenstreiche - Kreuzige! – Pilatus sprach – Wir haben ein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7afadf054954dc049b6626ca8e068f702100359e78137aef1092a576aa23bbe8. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1706429 — a six-check JSON result.
St. John Passion, BWV 245 Pt. 2: XXIII. Die Jüden aber schrieen - Lässest du diesen los – Da Pilatus das Wort hörete – Weg, weg mit dem – Spricht Pilatus zu ihnen – Wir haben keinen König - D
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ddd006359c21f185e1bab6b43328fb381a5004366eb674c58d31a7a5c731c5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBELX1706431 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb25b4ffb4bca628726b2304d283c5a3556da50d62fee5b8a4e429040ec4417a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4BV0691901 — a six-check JSON result.
Messiah, HWV 56: Part I: Accompagnato: Comfort ye my people (Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4eb2c9aaab78dfa624c3c44625489c7bf8ffbcbd19cbac1e56fae106688817c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4BV0691902 — a six-check JSON result.
Messiah, HWV 56: Part I: Aria: Every valley shall be exalted (Tenor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cde062e1511df921b2c336bcbadfab093494e8772ddb78b7c18558e1683853d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4BV0691903 — a six-check JSON result.
Messiah, HWV 56: Part I: And the glory of the Lord shall be revealed (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22c6f2014eab29625a8045058ea1cfd039a83ff96e5d4d30eb64a39fe9036f6. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4BV0691904 — a six-check JSON result.
Messiah, HWV 56: Part I: Aria: But who may abide the day of His coming? (Alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802d39262a585232828592ce48ebefa2d46224846bd03097cf3fbcee8b809a59. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4BV0691906 — a six-check JSON result.
Messiah, HWV 56: Part I: And He shall purify the sons of Levi (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9ceb79050cf0088a8c24cafd14bd83baa4cde7c1430cff81705c743f786d17. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4BV0691907 — a six-check JSON result.
Messiah, HWV 56: Part I: Aria: O thou that tellest good tidings to Zion (Alto, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3490dc29b155662220bc8a53bb58e8976c9215749e892480689996248747d3eb. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US4BV0691909 — a six-check JSON result.