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 0x242e604a17a2375011a0f88413afe7b3d70d0b8bbe5c370a25e721b9a00b400e. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0cc69380-2e0d-45a0-b4d0-1e085f61cf8c.json and https://artists.proofprofile.net/proofs/artist/0cc69380-2e0d-45a0-b4d0-1e085f61cf8c.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Sonata a Violino solo e Basso in G Minor, Op. 1, No. 2: I. Adagio
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 0x266ce6f2f5e8d67ff735306d6338cc1014f928536e859e6866abb0ec48db0dee. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FR7JM1744010 — a six-check JSON result.
Sonata a Violino solo e Basso in G Minor, Op. 1, No. 2: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ab0c0fc9be990df202f4b81756e272a3796edbcc15a22e0a264354b768593b. 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/FR7JM1744020 — a six-check JSON result.
Sonata a Violino solo e Basso in G Minor, Op. 1, No. 2: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6811902c4e5161813660bff4a10a8da9883eeb578ed2c81f8b646be87a3924cd. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/FR7JM1744030 — a six-check JSON result.
Sonata a Violino solo e Basso in G Minor, Op. 1, No. 2: IV. Allemanda
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac7acb632a2c67004d4797dfb7473e02d2e5ca1839df1599167d21e309ef004e. 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/FR7JM1744040 — a six-check JSON result.
Sonata a Violino solo e Basso in G Minor, Op. 1, No. 2: V. Giga Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d79ab82aed150a1d9e474054e8ca042702022a1586b96d3de9d1df20f41d4ee. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR7JM1744050 — a six-check JSON result.
Pièces de viole, deuxième suite: IV. La Leclair
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bd97485db03852b0b955b759b58f5dcabd100c14050b702b17cbc2393f8d86. 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/FR7JM1744060 — a six-check JSON result.
Sonata for Violin and Continuo No. 2 in E Minor, Op. 9: I. Andante. Dolce
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898f98ec451260ab34493fa2281c5dfb78e1a39a755e824f38653e1824cb055c. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FR7JM1744070 — a six-check JSON result.
Sonata for Violin and Continuo No. 2 in E Minor, Op. 9: II. Allemanda. Allegro ma non tropo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f974420544897585c42785bc1582c3a5fde5196296ba1900191c96614ec3e77. 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/FR7JM1744080 — a six-check JSON result.
Sonata for Violin and Continuo No. 2 in E Minor, Op. 9: III. Sarabanda. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed8801b2b0d374c99c663f80708a141716aa529f530a6e91f8ccb1f63b49442f. 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/FR7JM1744090 — a six-check JSON result.
Sonata for Violin and Continuo No. 2 in E Minor, Op. 9: IV. Minuetto. Allegro non tropo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bf29f63efd8292df656c10b6844fe33d9714d38e194f8c18d9e54e390013aa. 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/FR7JM1744100 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56b5dccb100d3485f0a4ec9c8cb7b5492c0ce68f7a387b29a9cda031df9355af. 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/FR7JM1744110 — a six-check JSON result.
Violin Sonata in C Major, Op. 5, No. 3 (transcribed for viola da gamba): I. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a087f85c9d77b9088486f862f8e5bee43b395ba9fab93afca9ddba594451122. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/FR7JM1744120 — a six-check JSON result.
Violin Sonata in C Major, Op. 5, No. 3 (transcribed for viola da gamba): II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x230bed7eb50d0093d32ef8b3288edb2b5266c47248990433b1125bb3237d13f9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR7JM1744130 — a six-check JSON result.
Violin Sonata in C Major, Op. 5, No. 3 (transcribed for viola da gamba): III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a30af79e136711486a486350cbabdf973b6491054ab88478f4881796c77f05. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR7JM1744140 — a six-check JSON result.
Violin Sonata in C Major, Op. 5, No. 3 (transcribed for viola da gamba): IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84863bdf696e163dcd22f1fad7182f5968c45a5408c0a018e6ca9c97e39a7df8. 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/FR7JM1744150 — a six-check JSON result.
Violin Sonata in C Major, Op. 5, No. 3 (transcribed for viola da gamba): V. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa91211206c4458389b1656808417516087007ce336dc052b3c45f3096ab577. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR7JM1744160 — a six-check JSON result.
Suite No. 4 in G Minor: La Marella. Vivement et marqué
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b230c3747c24b2cc6c5a78a55de10d9801b44598d480616ce1f48861ef674a4. 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/FR7JM1744170 — a six-check JSON result.
Suite No. 4 in G Minor: La Clément. Noblement et détaché
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3f60a0da5526b3413cc53dd27f23918839bf2d7f8553bf7c06bb63b8c13daf. 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/FR7JM1744180 — a six-check JSON result.
Suite No. 4 in G Minor: Sarabande La D'aubonne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608109a7dbaa276919553b762874b076c8b5490a6b96e71b0572c25e79cf68e1. 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/FR7JM1744190 — a six-check JSON result.
Suite No. 4 in G Minor: La Bournonville. Mouvement élevé
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224f88249ea51eee4a27f04dbbed148efee1ac240c31e8966b6052bb25532ad2. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FR7JM1744200 — a six-check JSON result.
Suite No. 4 in G Minor: La Sainscy. Gracieusement et avec esprit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ec5915b54df4645d50a578023abcefd09a942c51356252f78f646808182461. 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/FR7JM1744210 — a six-check JSON result.
Suite No. 4 in G Minor: Le Carillon de Passy. Légèrement sans vitesse - La Latour. D'un mouvement un peu plus vif - Le Carillon de Passy (reprise)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772865e038f0e35bb1578cbfc2d90c583f37dcb56a845ae3109b843a89a7fb42. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FR7JM1744220 — a six-check JSON result.
Suite No. 3 in G Major: La Morangis ou La Plissay. Mouvement de chaconne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a385954e07621de20c9fb728ee41ae39ab7d25073230e49e04e7663b134f3f. 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/FR7JM1744230 — a six-check JSON result.