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 0xc3006d070da7521a41956df1158fe1de8f53c8ad6e0e205dc6865fe616990dab. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6e20506c-8ffe-4433-840a-403e9778889d.json and https://artists.proofprofile.net/proofs/artist/6e20506c-8ffe-4433-840a-403e9778889d.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Oratorio de Noel, Op. 12: Tollite hostias (Chorus)
Saint-Saens: Oratorio De Noel (Christmas Oratorio), Op. 12
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 0x2f9e0cfcdb739e71710ec6ecf02b5d00610e9f73840f858d2fab178e8a1e8c10. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/DEAD60502310 — a six-check JSON result.
Oratorio de Noel, Op. 12: Prelude (In the Style of Seb. Bach)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724b66ff13bbb811415f9404d336abc4921589cca1c7239d6c9a3f5f22fa5552. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60502301 — a six-check JSON result.
Oratorio de Noel, Op. 12: Duet: Benedictus qui venit (Soprano, Basso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fdfed2f104715fb619b32a39796ad00495a800676e7987b93ee61a3ee8564da. 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/DEAD60502305 — a six-check JSON result.
Oratorio de Noel, Op. 12: Recitative and Chorus: Et Pastores erant - Gloria (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b4952836c41f12b7a761103bda6686d620479694bfe606853ebabe888c98b4. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEAD60502302 — a six-check JSON result.
Oratorio de Noel, Op. 12: Quare fremuerunt gentes (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57dc6c3b5e8c5636de0b8675dca2c7f32c913fa7ce405fce744af621c3ef52e. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60502306 — a six-check JSON result.
Oratorio de Noel, Op. 12: Air: Expectants expectavi Dominum (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9011c0134a9ebc65f0e0cb958ee2dbf1a6b4b83f8add04a1a4c3d4fb273295f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEAD60502303 — a six-check JSON result.
Oratorio de Noel, Op. 12: Air: Domine, ego credidi (Tenor, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf3a3f2f4693e1874a511dc0f9b3fef3217e0bd2ae36f5d18d39da94dbbc556c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60502304 — a six-check JSON result.
Oratorio de Noel, Op. 12: Trio: Tecum principium (Soprano, Tenor, Basso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dcf210dba839ac413823ac91c9bc6777e5e49d83fd364613449177af66cbb0. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/DEAD60502307 — a six-check JSON result.
Oratorio de Noel, Op. 12: Quartet: Alleluja (Soprano, Soprano, Alto, Basso)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa42ea3e93425d926baa2f62b2d61f45876a606f9d2186f1c08392a8a24b7edf9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEAD60502308 — a six-check JSON result.
Oratorio de Noel, Op. 12: Quintet and Chorus: Consurge, Filia Sion (Soprano, Soprano, Alto, Basso, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d9ab36b912ac867e7b9b50cc025dec9bd0b92b97a2c1202256609a9e588934. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAD60502309 — a six-check JSON result.
Weihnachts-Oratorium, BWV 248, Pt. 1: Jauchzet, frohlocket
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3236bc9123f15338d0dbf4b088afadea968d8e2c3d5dc7a52634e3fb177cec2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKI191817201 — a six-check JSON result.
Weihnachts-Oratorium, BWV 248, Pt. 1: Es begab sich aber
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50adb1f40045a8dc9246dacb928bfe8eaeb6293d59c301e73178578e288a39d1. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/HKI191817202 — a six-check JSON result.
Weihnachts-Oratorium, BWV 248, Pt. 1: Nun wird mein liebster Bräutigam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8cfcaf24a5cdfee2b6167a6c75fc4945a318f7a2fe7f182bb2dcfd8ecc3e5bd. 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/HKI191817203 — a six-check JSON result.
Weihnachts-Oratorium, BWV 248, Pt. 1: Bereite dich, Zion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76e55c2ca1f68836252d2dfeeea7dd3160e5df7546c3bf6d426d1fe0725133d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/HKI191817204 — a six-check JSON result.
Weihnachts-Oratorium, BWV 248, Pt. 1: Wie soll ich dich empfangen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d6795c54f672d1a5ee6626d64c6e9867e387a33889a1a5a6940fb71de451bf. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKI191817205 — a six-check JSON result.