1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x0d20084373638eabb7c71fb92a35d67d86da4f770ffbcee2ba81867374331a21. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa49eb6c-ffdf-4d05-891a-da8f056d8d42.json and https://artists.proofprofile.net/proofs/artist/fa49eb6c-ffdf-4d05-891a-da8f056d8d42.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 → block OTSBitcoinBlock must exist at that height 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 0xf1f910e9f43622fbd1863327adda71e402ffdcaa254ae48c032895b3ead76224. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZPLS2524734.
Sonata for two Violins and Continuo, Op. 1 No. 2 (Arranged for two Cello Piccolos): I. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956405764801dac07843a9dfd2670a1c44ddff0d984745c496ea473ab648d3c8. 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/NLB152400658.
Sonata for two Violins and Continuo, Op. 1 No. 2 (Arranged for two Cello Piccolos): II. Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df6f66d5b47a40125fc3ffc0f9c1a7fab7a342526d458895eab1271da6fa483. 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/NLB152400659.
Sonata for two Violins and Continuo, Op. 1 No. 2 (Arranged for two Cello Piccolos): III. Allegro
Sonata for Cello and Basso Continuo, Op. 5 No. 3: I. Andante
Sonata for Cello and Basso Continuo, Op. 5 No. 3: II. Allegro
Sonata for Cello and Basso Continuo, Op. 5 No. 3: III. Affettuoso
Sonata for Cello and Basso Continuo, Op. 5 No. 3: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd17b1da5da05e4257891e762b067de84cf6152ebd47bc61e8cdca4850b1c34c. 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/NLB152400664.
The Art of Playing the Guitar or Cittra (Arranged for Cello Piccolo and b.c.): Canon
Sonata for Cello and Basso Continuo, Op. 5 No. 2: I. Andante
Sonata for Cello and Basso Continuo, Op. 5 No. 2: II. Presto
Sonata for Cello and Basso Continuo, Op. 5 No. 2: III. Adagio
Sonata for Cello and Basso Continuo, Op. 5 No. 2: IV. Allegro
The Art of Playing the Guitar or Cittra (Arranged for Cello Piccolo and b.c.): Affettuoso
Sonata for Cello and Basso Continuo, Op. 5 No. 1: I. Andante
Sonata for Cello and Basso Continuo, Op. 5 No. 1: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033506b776bd8683b02e5d07502fe7033994ca61650ab27c5ef9665d6be3e80f. 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/NLB152400672.
Sonata for Cello and Basso Continuo, Op. 5 No. 1: III. Andante
Sonata for Cello and Basso Continuo, Op. 5 No. 1: IV. Allegro
Sonata for Cello and Basso Continuo, Op. 5 No. 6: I. Adagio
Sonata for Cello and Basso Continuo, Op. 5 No. 6: II. Allegro assai - Grave
Sonata for Cello and Basso Continuo, Op. 5 No. 6: III. Allegro - Non tanto