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 0xbaa2d3c8fd990b67279115de1a2e8cfac86b176f2ce9741d615032c218940eee. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6af8aecb-7b91-456a-891e-02229568e598.json and https://artists.proofprofile.net/proofs/artist/6af8aecb-7b91-456a-891e-02229568e598.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Trattenimenti armonici per camera, divisi in dodici sonate à violino, violone e cembalo, Opera sexta, Sonata No. 6 in A Minor: I. Adagio
Albinoni: Per diletto, Suonate a tre trattenimenti armonici & Sinfonia a 4
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 0x128847b93774b8999a9f9079a68dbed5c31d52cc911cb6dd01790234b8983134. 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/FR46Y1410401 — a six-check JSON result.
Trattenimenti armonici per camera, divisi in dodici sonate à violino, violone e cembalo, Opera sexta, Sonata No. 6 in A Minor: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d859a0246907ac0d06e2d337059e4c9362bcf182cb5b0ef64a8bbf0a38b483e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FR46Y1410402 — a six-check JSON result.
Trattenimenti armonici per camera, divisi in dodici sonate à violino, violone e cembalo, Opera sexta, Sonata No. 6 in A Minor: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9981055ef7a399e03b9cf7d02c38ff226c1334e2f7e35dca1d1cab0c13ef83. 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/FR46Y1410403 — a six-check JSON result.
Trattenimenti armonici per camera, divisi in dodici sonate à violino, violone e cembalo, Opera sexta, Sonata No. 6 in A Minor: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b5f72492df0209025b48fa17bfef657c1f3c7f81b4614f8a335e6d340d3e77. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/FR46Y1410404 — a six-check JSON result.
Suonate a tre doi violini e violoncello col basso per l’organo, Opera prima, Sonata No. 1 in D Minor: I. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b11bd1a7857bdef2ea4d2ef3e1d5de18dba83cc37c853e8663f4648b19c05ae. 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/FR46Y1410405 — a six-check JSON result.
Suonate a tre doi violini e violoncello col basso per l’organo, Opera prima, Sonata No. 1 in D Minor: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b4ab5deecdb117e88b0cf62fb70fff8150793c3ec73681af0a6ce3f1bc7d37. 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/FR46Y1410406 — a six-check JSON result.
Suonate a tre doi violini e violoncello col basso per l’organo, Opera prima, Sonata No. 1 in D Minor: III. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36dda89f760aef498a795399ba9cbd2585b3bdb99de98c94d63b59798060aaae. 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/FR46Y1410407 — a six-check JSON result.
Suonate a tre doi violini e violoncello col basso per l’organo, Opera prima, Sonata No. 1 in D Minor: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe12ce25a964903e1bfc99aee57396e73c8093ac38b9432587a381bd0224b9663. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FR46Y1410408 — a six-check JSON result.
Trattenimenti armonici per camera, divisi in dodici sonate à violino, violone e cembalo, Opera sexta, Sonata No. 11 in A Major: I. Grave adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d97fa18872e8fdfeaf01c990266d3c0d4d79eb989bbc9b60de624f1321fb156. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/FR46Y1410409 — a six-check JSON result.
Trattenimenti armonici per camera, divisi in dodici sonate à violino, violone e cembalo, Opera sexta, Sonata No. 11 in A Major: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d4c35a2aaa527b855a7759221c7ebceb17317ee073a5455fe400c159bc2c33. 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/FR46Y1410410 — a six-check JSON result.
Trattenimenti armonici per camera, divisi in dodici sonate à violino, violone e cembalo, Opera sexta, Sonata No. 11 in A Major: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeef71ffb83f9f71634672fe96d8e57d468091af454b2499bf1462655c3dc913. 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/FR46Y1410411 — a six-check JSON result.
Trattenimenti armonici per camera, divisi in dodici sonate à violino, violone e cembalo, Opera sexta, Sonata No. 11 in A Major: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd809a21665422d79fa3e079458006452837d3bac44d48ca6396c60cb02e0f297. 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/FR46Y1410412 — a six-check JSON result.
Suonate a tre doi violini e violoncello col basso per l’organo, Opera prima, Sonata No. 9 in D Major: I. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9950b7ac937170f6840e46e150c4ed5666104cb8cf6c10d58b16c02eaee9abbb. 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/FR46Y1410413 — a six-check JSON result.
Suonate a tre doi violini e violoncello col basso per l’organo, Opera prima, Sonata No. 9 in D Major: II. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc91fe503bac59ab716420e89df8c6c3ff1a516551b6b531439479487f0854e2. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FR46Y1410414 — a six-check JSON result.
Suonate a tre doi violini e violoncello col basso per l’organo, Opera prima, Sonata No. 9 in D Major: III. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40cba133efa2aed711e5221d6a6829ece4b414ff18bc7b88b1936dd051ab3fb5. 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/FR46Y1410415 — a six-check JSON result.
Suonate a tre doi violini e violoncello col basso per l’organo, Opera prima, Sonata No. 9 in D Major: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fab4066c48911e3879369f64da2ade547fb1cbd2a63418119848add4e8f5323. 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/FR46Y1410416 — a six-check JSON result.
Suonate a tre doi violini e violoncello col basso per l’organo, Opera prima, Sonata No. 8 in B Minor: I. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4e2ca5e3095e95b24e74c74d94d3e8e817b01167f4b303f5fdcfb9beece560. 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/FR46Y1410417 — a six-check JSON result.
Suonate a tre doi violini e violoncello col basso per l’organo, Opera prima, Sonata No. 8 in B Minor: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de904df82a28bcc5598e9e50b088c35be0c7806ce17c5d0ea30f196299816c3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR46Y1410418 — a six-check JSON result.
Suonate a tre doi violini e violoncello col basso per l’organo, Opera prima, Sonata No. 8 in B Minor: III. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8815f7333c9e9949a0d8ddab1c6a2a04c8e3d73713b8db980389b7418a2097d8. 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/FR46Y1410419 — a six-check JSON result.
Suonate a tre doi violini e violoncello col basso per l’organo, Opera prima, Sonata No. 8 in B Minor: IV. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91e9700b8ab2957080e439de2df9ff9dd85f6471ad8307d55e735f64f213fd2. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR46Y1410420 — a six-check JSON result.