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 0x59caa87f9d0f7568e51fbce94025a8b63c99bf9512f61e720e4c6d673c08e098. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/494af43b-b2a3-4811-a29b-8f1737e94e17.json and https://artists.proofprofile.net/proofs/artist/494af43b-b2a3-4811-a29b-8f1737e94e17.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Violin Concerto No. 1 in E Major "Spring", RV 269: I. Allegro (with Sonnet)
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 0xdb405cf8937f9ba7fcce2863cd3b84e66cca4b8c5f3f68fb959e328b4d7746a1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH4212400030.
Violin Concerto No. 1 in E Major "Spring", RV 269: II. Largo e pianissimo (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691f3ab8a686311714747fc2c65704e723d4b3bbd8caa2b673cc460ddc28dee6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/CH4212400031.
Violin Concerto No. 2 in G Minor "Summer", RV 315: III. Presto (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37d88b51ec01edd47f958bd1248350501853fbb272c86c43517e5634050e8a8. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/CH4212400035.
Violin Concerto No. 4 in F Minor "Winter", RV 297: I. Allegro non molto (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3aca56a772ceff854c756585189a454296180c9e620e93deba55df70f330feb. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/CH4212400039.
Violin Concerto No. 4 in F Minor "Winter", RV 297: II. Largo (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823d9a7eaa5a844ec9022ab84fc53b590932eaa7e8d632306a3d6f3103198b18. 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/CH4212400040.
Concerto for Violin and Cello in F Major "Il Proteo o sia il mondo al rovescio", RV 544: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9322ef90e759482febfa942a64e369d77888c5ffbf411af9f37b1ccf70d64d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH4212400043.
Violin Concerto in E-Flat Major "La Tempesta di mare", RV 253: I. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7acf812717f05c1bf0965113e03a9dddd9602440911b587b2ff5be13c5702543. 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/CH4212400045.
Violin Concerto in E-Flat Major "La Tempesta di mare", RV 253: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d9ccaa8a6d42bd8d983696102a2d812fe6427cacfc923bd58654c437dc6c45. 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/CH4212400046.
Concerto for 4 Violins Op. 3, No. 10 in B Minor, RV 580: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40508e70cf0c813672b0e5423b0e6f889ce49984779a7090334c20481c4cc965. 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/CH4212400048.
Violin Concerto No. 1 in E Major "Spring", RV 269: III. Allegro (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e4f6b2760a42130dcec3621fed709e6bc97d616f3e6db49180220aae2b823c. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH4212400032.
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
Violin Concerto No. 2 in G Minor "Summer", RV 315: I. Allegro ma non molto (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e86e89215b5e87d317624db6c37f8cde1264ef3967cc566316655662fd846e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/CH4212400033.
Violin Concerto No. 2 in G Minor "Summer", RV 315: II. Adagio (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8d2979cffac7469841f0edd8198ceebdff532b86eab2bf5a1b2eae19f97d4a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH4212400034.
Violin Concerto No. 3 in F Major "Autumn", RV 293: I. Allegro (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc777c21a8283e1ecdea31905670b81dff2728f0da28628a6e6e53bb814c70678. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CH4212400036.
Violin Concerto No. 3 in F Major "Autumn", RV 293: II. Adagio molto (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ebd298dc43dffe4854d3dc29dee972659ead29dbf2a768eab194a7a426a1bb. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CH4212400037.
Violin Concerto No. 3 in F Major "Autumn", RV 293: III. Allegro (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22e9c667a5179e19b36f65d33a185ade8651b137ca6992454d0a482078e0a82. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/CH4212400038.
Violin Concerto No. 4 in F Minor "Winter", RV 297: III. Allegro (with Sonnet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc94e5b909a878d4332ded959b38da4611af08e247c9c8bf014b22cdc1730148. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH4212400041.
Concerto for Violin and Cello in F Major "Il Proteo o sia il mondo al rovescio", RV 544: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c8077d7ed63bd775103fbec4dd10ef4e7a950bfc070329464c7a86d9d704b6. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/CH4212400042.
Concerto for Violin and Cello in F Major "Il Proteo o sia il mondo al rovescio", RV 544: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc591f7efca2ea61a93992b2d5fb50509c18862d4738fe7da819e29bf9f2c4692. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CH4212400044.
Violin Concerto in E-Flat Major "La Tempesta di mare", RV 253: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb4cca9600f1bd8b44d8565b10c336a7acda08b2f11d3cd770de6ff1a47982a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CH4212400047.
Concerto for 4 Violins Op. 3, No. 10 in B Minor, RV 580: II. Largo - Larghetto - Adagio - Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae03a7e7593d9766c53e6e5a7793581513b0e0ee49873234956e85ce59fa377. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/CH4212400049.