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 0x706ba42b02f65951bce37677837681db46a74398e9536de165fb8d40cfea8f3c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ccd1bbf8-e397-445f-956b-721b7b60f84d.json and https://artists.proofprofile.net/proofs/artist/ccd1bbf8-e397-445f-956b-721b7b60f84d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xb4587380f17950b27dccdcb6650dacb415433c4477b436807ec77312f8c3ede4. 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/ITV701108201.
The Four Seasons, Violin Concerto No. 1 in E Major, RV. 269 'La primavera': I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b4934c75d7a444e1eb8bce279a522c56764c1f09d21bcc95e90c2cd58c933e. 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/GBAYD7200044.
Czech Suite, B. 93: IV. Romanza (Andante con moto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec1d76fc82d3649fa9245c2dd5d6a86bec1e81f079fcb4bd600649d189a61e3. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBAYC8902429.
Nocturnes, Op. 9: No. 1, Larghetto in B-Flat Minor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f2692ab35d0eed0275910aa936b31df3e1c29cd123ccef4a1cc28a9d755328. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRZ119505920.
Cello Suite No. 1 in G Major, BWV 1007: I. Prelude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86996532f9c2fc07165c9924bb017688d3d2e6b9025cb22b3d730b3ec3b5300. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBAYC9300913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d881e563b81ed3b697e0b2c5341bd31be04e61eec13b456f6a2f6e5bd18b10. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBAYC8703086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c4ecb15752ff478ef880be16a47d8a5deea5a24d274c9addeeb5b29691c222. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBAYC9000556.
Violin Concerto in D Major, RV 228: I. Allegro non troppo ma vigoroso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc76ed142bc1e3607b5b0a884d6fd2ec73a7d9d3afe14157612faea0b29e6d38. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/HKI199602201.
Violin Concerto in D Major, RV 228: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf499db9e97d0a4f0023f4bc8bf3ad4cea8fe2d0deff1e783d38b44f16162445a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI199602203.
Violin Concerto in B Minor, RV 384: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250dbfcfc8171b9fef1bca1f47da88c461489e346fba20c6780371a347d3eea8. 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/HKI199602205.
Violin Concerto in B Minor, RV 384: III. (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4947c8922995278fb4db0c5920b76ce0f88f7471cced49567f4b9dce4c8d36. 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/HKI199602206.
Violin Concerto in G Minor, RV 323: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf0c525be4262abe3fbea5028f8910d6b2975455cabc983773ca7d5d58e6740. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HKI199602210.
Violin Concerto in F Major, RV 285: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc38e245a6b15788fa8c6b531679bdb0d651c884975a4204c4bbaad57c45e7f5. 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/HKI199602213.
Violin Concerto in F Major, RV 285: III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9559fc373f9f9e0fd0c3c433f8fe6eca4553baf6b656a5f2a6c703a3ae45f103. 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/HKI199602215.
Violin Concerto in D Minor, RV 245: III. (Allegro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1643007d093af142f6cae15c0874fca6d9db3272a69cc8dc2677e103a7c6ac6a. 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/HKI199602218.
Violin Sonata No. 5 in F Major, Op. 24 "Spring": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd179517168972837e4adb87e1e499a8ec399e8ca483bbf036d0b99095d2094c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBAYC8500740.
Violin Concerto in A Minor, BWV 1041: I. (No Tempo Indication)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a1b32b7eb9f17443991d6a2ec57a0beb3ff98684932d65092dbd7d1b495fe65. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC8200226.
Antonio Vivaldi : Il Canto, dallo strumento alla voce
Vivaldi : Le quattro stagioni a parte reali - Sonate RV27 & RV36
Antonio Bazzini, Giuseppe Martucci, Ottorino Respighi
Ravel & Fauré: Trios pour violon, violoncelle et piano
Vivaldi: Concerto for Four Violins in B-Flat Major, RV 553: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9518eb1513d71cab35a76e4eab0d49a900d5c12f262af8636682254ad99c8e4c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ208308802.
Vivaldi: L'estro armonico, Violin Concerto in G Major, Op. 3 No. 3, RV 310: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfce5dde32b91486828798c851898e8f2ba252548c83d916cb8d742a27032aee. 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/FRZ208717620.
Vivaldi: L'estro armonico, Violin Concerto in A Minor, Op. 3 No. 6, RV 356: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8d4b7b95f224d520219f686a193497e77af155352c4941a14f695c1f8aabeb. 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/FRZ208717930.
Vivaldi: L'estro armonico, Violin Concerto in D Major, Op. 3 No. 9, RV 230: II. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5916fcf605c40e92eb25297289290018336bc095f70933ff0a40c8ae5df63eff. 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/FRZ208718220.
Vivaldi: Violin Concerto in B-Flat Major, RV 363 "Il corneto da posta": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5404e39dc57c3e101828ceee77572d3e237d21eb6e5d1a48b172c3a38dec395d. 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/FRZ208000017.
Vivaldi: Violin Concerto in D Major, RV 208 "Il grosso Mogul": II. Grave
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9da358e707506fe944416fddfd8bdd974c26108fc7507fafbd8f550320c26b. 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/FRZ208010003.
Vivaldi: Violin Concerto in E Major, RV 271 "L'amoroso": I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b33357e2d36baaca24b84b9271f974148dc7d599b6cba986975ae2dfc7b2147. 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/FRZ208000014.
Vivaldi: Violin Concerto in E Major, RV 271 "L'amoroso": III. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4856455d77be0435b10e809940f47d89572b279ef57f751687cc4313948bad71. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ208000016.