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 0x46ea4c0391a3ea585b06b3174d1767d62e503109e217b538bb6dad61d7a9edb4. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96070543-e8a1-43c9-b562-233c9606662f.json and https://artists.proofprofile.net/proofs/artist/96070543-e8a1-43c9-b562-233c9606662f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto for Violin, Organ, Strings and Continuo in C Major, "Il rosignuolo", RV 335a: III. Allegro
Vivaldi: Bizzarie Venetiane. Concerti per vari strumenti
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 0x91a6ecf33f9d4684c20d8c7af880556b6cc0d67bdad821711044ba172bff4182. 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/ES7141500344.
Concerto for Violin, Organ, Strings and Continuo in D Minor, RV 541: II. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521cbcc3450d4b34368f792fd92f1a885e2383b8bc02c1ef074fb978a445a7e6. 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/ES7141500328.
Concerto for Violin, Organ, Strings and Continuo in D Minor, RV 541: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0af2021a4216b8de2e0cc567ba7a767885c3ec3199acb74736de23b83bb9712. 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/ES7141500329.
Concerto for Violin, Violoncello, Organ, Strings and Continuo in C Major, RV 554a: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071f07357f55e9d1a51ed2b11bd05b8d9f40f0b30c2939db5a64e3854fe87a2f. 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/ES7141500333.
Concerto for Violin, Violoncello, Organ, Strings and Continuo in C Major, RV 554a: II. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd56e882785c54266c586d799668b094f40d708d2c0b50c668025e0f3bd5d6a26. 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/ES7141500334.
Concerto for Traverso, Organ, Strings and Continuo in F Major, RV 767: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56513fbdea07826d78fd93f4310303ee4e57153165d0f939ee786610423df7f3. 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/ES7141500346.
Concerto for Violin, Organ, Strings and Continuo in F Major, RV 542: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x108adad552b53c5cc5432b12a911c2c03af3392a6ba556c808e35349b0458096. 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/ES7141500371.
Concerto for Violin, Organ, Strings and Continuo in C Major, "Il rosignuolo", RV 335a: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd793fbe8e5b019f2829a254a295a4fb85b746e5fbd66409cb2bfaa619a123404. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7141500342.
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
Concerto for Violin, Organ, Strings and Continuo in C Major, "Il rosignuolo", RV 335a: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd98f4aba463ad61f0769d49a94879383292088bbf2528b05741be227e2abe99. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7141500343.
Concerto for Violin, Organ, Strings and Continuo in D Minor, RV 541: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a17f34b2cecec1b97724c8706ea061514ec34ecd4a3404689c92a75e7a7b144. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7141500327.
Concerto for Violin, Violoncello, Organ, Strings and Continuo in C Major, RV 554a: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85177382b20603d5f2d3aa41a20399b836994c5dae3f66853a6b1e1703040dc8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7141500335.
Concerto for Violin, Organ, Strings and Continuo in C Minor, RV 766: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43fa0fd4ea2bbe2f8be1eed8f2508c3d3c4f7d5834c37d873e9ed8a3d0423e3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7141500354.
Concerto for Violin, Organ, Strings and Continuo in C Minor, RV 766: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3820831be5772642e38d6e1f2aa1cbb5fd1a806136878fb9e5e670fd412ad978. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7141500356.
Sonata for Violin, Traverso and Organ in C Major, RV 779: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fe649fbbcfcc427e0a2b2556f931197984373c688b7b9a3b3a17e5320064dc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7141500357.
Sonata for Violin, Traverso and Organ in C Major, RV 779: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d0d2ac022a556415309c4d8afd840c11939ff9775e3872ada831e3e2e9d0e5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7141500358.
Sonata for Violin, Traverso and Organ in C Major, RV 779: III. Largo e cantabile
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc741ee69006536b4d8b6265cc260893b6c751dc942f03274d841b8c36426ed8c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7141500359.