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 0xeb4abcdbf6d75ed433d33d39b0025462807f39fe0929bf571999848f16842ccd. Chain 2 (Bitcoin): anchored in block 954043 (2026-06-17T04:15:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3dc18f9d-b5d3-4950-a0e6-42848928dbd9.json and https://artists.proofprofile.net/proofs/artist/3dc18f9d-b5d3-4950-a0e6-42848928dbd9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Baroque Trumpet (The Art Of The), Vol. 2
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 0x5a12f434a9604a13f877991e0d10c96a6db5a70af13c2180c7d0f62a2d8c57fe. 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/HKI199715408.
Art & Music: Rembrandt - Music of His Time
Brandenburg Concerto No. 3 in G Major, BWV 1048: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2026c698ba77be4ad3d93069e7f94ca96d09d715fe92446caad1611737df2c50. 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/SEWDL9750014.
Orchestral Suite No. 3 in D Major, BWV 1068: Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1f07048e7fb781ba0a360496c3f15a1c31b3cdc7b7f1df799e9d6134c2962e. 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/SEWDL9750009.
The Well-Tempered Clavier: Prelude No. 1 in C Major, BWV 846
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f678c5d377cdee9ec5db0b3f8f7660daf959ed6ebe612fbee4508f6856119cb. 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/SEWDL6018029.
Cello Suite No. 3 in C Major, BWV 1009: V. Bourée 1 & 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f623f8fbb03c576bb722a7a96abb2c77edb5425a00ad485f94b4731256e622. 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/SEWDL0712705.
Concerto in G Minor for Violin and Strings, BWV 1056R: II. Arioso: Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366d0c4b9229662c568bab055e8fcc53d99d245c44738412f1af69075418d573. 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/SEWDL0727002.
Double Concerto in D Minor for Two Violins, BWV 1043: Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972cfaa55eec06213fc386165420c4987b0980d1e9abd6684641414bb9bc3165. 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/SEWDL9750042.
Orchestral Suite No. 3 in D Major, BWV 1068: II. Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd1f07048e7fb781ba0a360496c3f15a1c31b3cdc7b7f1df799e9d6134c2962e. 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/SEWDL9750009.
Violin Concerto in G Minor, BWV 1056R: II. Arioso: Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c839c328808d8b706cbaf2b542d3690e1930cbf4d7716f2ae561e345225bd2. 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/SEWDL6018030.
Cello Suite No. 1 in G Major, BWV 1007: I. Prélude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3b436aec9e01ff84838dfb6dd1d7b6352ba8564cb3b5ff59c9cb273c683cc7. 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/SEWDL0512601.
Suite in G Minor, BWV 995: II. Allemande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6d5a86da4215fd7b76029467ecec9f7e2dc98df04c3e6e2c1993f7914cf43c. 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/SEWDL0717402.
Christmas Oratorio, BWV 248, Part 1: IX. Chorale: Ach, mein herzliebes Jesulein!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae068fb61d0425b31ab79a9fa591de1c427f6e1013854f8c35916aa563b7aa3. 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/SEAEJ9841090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace7ccec4ec34fab00115e2d8743e78dfdcdc939bc65118cbe440dd17134ff71. 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/SEWDL6142958.
Concertos pour une, Deux & trois trompettes
Concerto en ut majeur pour 2 trompettes & cordes: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee6d4b79dbec0a329664f9945af14a50a5c937ed67da0ac4108634a71bc8a39. 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/FRZ177602650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f50a8e8727f4a7c90c9f44cc0b10c745f8ec0e654a9ca68ed54804ea6789074. 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/SEWDL0741302.
Trumpet Sonata No. 3, "Detta del Niccolini"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4422219306286124d5c3f51400474f05f65e9f3b261a0bb8bc35658aa7d8b0bf. 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/HKI199715402.