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 0x26642f0f15dac4c5bed795b21c1a37c4d83a0e9894b8a385fd546d77627e9077. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/acfbb9be-03b3-41fb-b75c-438d29ba73e5.json and https://artists.proofprofile.net/proofs/artist/acfbb9be-03b3-41fb-b75c-438d29ba73e5.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Corelli: Sonate per Viola da Gamba & basso continuo, Op. 5
Sonata in C Major, Op. 5, No. 3 (version for viola da gamba and basso continuo): 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 0x290b4e1ecdf602a152c95ca16a17863c819228c9393742a7e0a992f73ce19b3b. 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/CH1491125001 — a six-check JSON result.
Sonata in C Major, Op. 5, No. 3 (version for viola da gamba and basso continuo): II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8efe849617f012e90f447aaf4d75785ddf11a7dfaf6378ee6e8dd45f2e6dceb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CH1491125002 — a six-check JSON result.
Sonata in F Major, Op. 5, No. 4 (version for viola da gamba and basso continuo): II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707902229d46e26eddec823b5c20f0ef6917f18f55b51717ec7deed1bd416995. 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/CH1491125026 — a six-check JSON result.
Sonata in C Major, Op. 5, No. 3 (version for viola da gamba and basso continuo): III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a83e362fd3a4c82fd2c699aabde520676d76ea23df4a4ea079e1a485406cbf5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CH1491125003 — a six-check JSON result.
Sonata in F Major, Op. 5, No. 4 (version for viola da gamba and basso continuo): III. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6366b818a6fb9967f2e3594f296910b1409932fb70e5288ef588e2b1248ebe48. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CH1491125027 — a six-check JSON result.
Sonata in C Major, Op. 5, No. 3 (version for viola da gamba and basso continuo): IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3513490a5e8af29113c8bd2919d967f8e5da224a8066647a7510f50bec086a54. 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/CH1491125004 — a six-check JSON result.
Sonata in C Major, Op. 5, No. 3 (version for viola da gamba and basso continuo): V. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44064c5fde2b2f55083f14b62fbe5244679c5261b4a0e8dd9a572b5209ba5a6e. 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/CH1491125005 — a six-check JSON result.
Sonata in F Major, Op. 5, No. 4 (version for viola da gamba and basso continuo): V. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9e3c4a353b875e36bd7a59683fe1bf23c461282db3ecb429ee8cbd4d59cd130. 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/CH1491125029 — a six-check JSON result.
Sonata in F Major, Op. 5, No. 10 (version for viola da gamba and basso continuo): I. Preludio: Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2b66b433b29188305effd596f1e596db7849b7514efda2f7aa8037f907b3b6. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CH1491125006 — a six-check JSON result.
Sonata in F Major, Op. 5, No. 10 (version for viola da gamba and basso continuo): II. Allemanda: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded990597c804ad63d8fe22c6e8aebce2dec2633c2e65fe6c82d66f16930895c. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/CH1491125007 — a six-check JSON result.
Sonata in F Major, Op. 5, No. 10 (version for viola da gamba and basso continuo): III. Sarabanda: Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7b67ee2bbf249f035c50a45588ee0fc7cac88babfbe3603873c7953bc536a1. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CH1491125008 — a six-check JSON result.
Sonata in F Major, Op. 5, No. 10 (version for viola da gamba and basso continuo): IV. Gavotta: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b021d8ba16ae517d674b7506a28b5c1392467128ced03f0a0b82f54436ad57d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CH1491125009 — a six-check JSON result.
Sonata in E Minor, Op. 5, No. 8 (version for viola da gamba and basso continuo): IV. Giga: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87faafe335089046d2a5f7739924e2f4393cffc5418c37ea5873bc06296675d3. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/CH1491125033 — a six-check JSON result.
Sonata in F Major, Op. 5, No. 10 (version for viola da gamba and basso continuo): V. Giga: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4ae4e585af8493f19e00496b48cb5bfabe6d5a9b1f4e7dad250feedfab0235. 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/CH1491125010 — a six-check JSON result.
Sonata in E Major, Op. 5, No. 11 (version for viola da gamba and basso continuo): I. Preludio: Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45eccf9b806d4259602e265ce97703d5f6d9ab818c4157b155a731d315130d77. 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/CH1491125011 — a six-check JSON result.
Sonata in E Major, Op. 5, No. 11 (version for viola da gamba and basso continuo): II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6ef1bc95aaa9989491205a3e108ba0550b0e7960058598b9dec75c3299aab5. 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/CH1491125012 — a six-check JSON result.
Sonata in E Major, Op. 5, No. 11 (version for viola da gamba and basso continuo): III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83064d8c62803782de44c1467c06b1141e2aaf6501543626ad34b460e6b99f29. 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/CH1491125013 — a six-check JSON result.
Sonata in E Major, Op. 5, No. 11 (version for viola da gamba and basso continuo): IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf103c856998d7e8c59da8592173caee2e798a7a0f5cf381cc0514d0ec3089c1. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/CH1491125014 — a six-check JSON result.
Sonata in E Major, Op. 5, No. 11 (version for viola da gamba and basso continuo): V. Gavotta: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726f743ecdc9e286f84b914bfe4dc76dc6d670cae52215ac184b24c58288d6a4. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/CH1491125015 — a six-check JSON result.
Sonata in D Major, Op. 5, No. 1 (version for viola da gamba and basso continuo): I. Grave - Allegro - Adagio - Grave - Allegro - Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb948f12c0358e896dd0881b241848f2955f4fb7c84e33f43d8b30cbd29add9. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CH1491125039 — a six-check JSON result.
Sonata in G Minor, Op. 5, No. 5 (version for viola da gamba and basso continuo): II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc5b63919985644b581737ae31f9d08b3fde5385ac3e8a3144f551ad8b5516a. 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/CH1491125017 — a six-check JSON result.
Sonata in G Minor, Op. 5, No. 5 (version for viola da gamba and basso continuo): III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd781d7b040c0e05744567e8586784e1a7e2773c7db602636705b9723cce5cd8. 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/CH1491125018 — a six-check JSON result.
Sonata in G Minor, Op. 5, No. 5 (version for viola da gamba and basso continuo): IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651af7f73d4d56ec0ec83b87ee57b317d6533bee3b67b36db0de97dc14985fc1. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/CH1491125019 — a six-check JSON result.
Sonata in G Minor, Op. 5, No. 7 (version for viola da gamba and basso continuo): I. Preludio: Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cda1f0b99ce14c2dab119f3683063142a676b080b9b198fc48903c65116731. 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/CH1491125021 — a six-check JSON result.
Sonata in G Minor, Op. 5, No. 7 (version for viola da gamba and basso continuo): II. Corrente: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d773da576563eafe6c87b04150f3f6be5e736ad3a61ba7aae5e1b006b69638b. 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/CH1491125022 — a six-check JSON result.
Sonata in G Minor, Op. 5, No. 7 (version for viola da gamba and basso continuo): III. Sarabanda: Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd9059ef0f5c31b71a21dacd452a4e21e7b0d32526047b20b4bf39fc73d1e2f. 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/CH1491125023 — a six-check JSON result.
Sonata in G Minor, Op. 5, No. 7 (version for viola da gamba and basso continuo): IV. Giga: Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe1eb08212c156e5149631a18f090040d2abe442bd7c6abe2d050bed3d6c7bd. 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/CH1491125024 — a six-check JSON result.
Sonata in G Minor, Op. 5, No. 12, "La Follia" (version for viola da gamba and basso continuo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a59f84c97dbe2594387ed7c6be768d16ae7d4dd96f5ffdaf85fced0189a1818. 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/CH1491125048 — a six-check JSON result.