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 0x757d933d3a0edfb5677ca1e95f6461b05176d417dbfa6e6e4e9ba06b8547cad0. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91a35142-4b8a-45ab-a0ea-bd77de5f4d4b.json and https://artists.proofprofile.net/proofs/artist/91a35142-4b8a-45ab-a0ea-bd77de5f4d4b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Les grandes heures du Bolchoï, Vol. 2: Les plus grandes valses
Les grandes heures du Bolchoï, Vol. 1: Les plus grands choeurs
Symphonie No. 9 in D Minor, Op. 125 - "Choral": Hymne à la joie (Extrait du 4ème mouvement)
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 0x9dfec0ed93a112d4fb0f16ef9e5d805d565bfad57611acd0c6e320a88bb8f952. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FRX080090186.
Khachaturian: Spartacus (Les Etoiles du Bolchoï)
Tchaikovsky: Le Lac des Cygnes (Les Etoiles du Bolchoï)
Le Lac des Cygnes, Op.20: Acte I, Scène 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf0ac610400e4936811e5a825c3717ef4d5db93fe0f371a3ecbd17533b83859. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX080700113.
Le Lac des Cygnes, Op.20: Acte I, Scène 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e101ec5ca806217f4bbea62d7d84dbf58086872d94d7067ecabcc8c2941b73. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FRX080700115.
Le Lac des Cygnes, Op.20: Acte I, Pas de Trois
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323fc62f882ab30b5a37515d8f724f32bffce01184db131d62247487fdcdaf94. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/FRX080700116.
Le Lac des Cygnes, Op.20: Acte IV, Danse des petits cygnes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60403d579897270819b49946c07c9c0b5229073eb7b64134f08f7558ed73dc8a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX080700133.
Le Lac des Cygnes, Op.20: Acte II, Scène 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a59f951f2da39f922e31beb08524b1a4f2ceef003b22aca4010af7c76dce95. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRX080700119.
Le Lac des Cygnes, Op.20: Acte IV, Scène Finale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16af67fee3773ccfa6d123fc8c51e4b86c42925aaf280a2985ab154ee40fb77e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX080700135.
Sérénade Pour Corde, Op. 48 En Ut Majeur
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1064ac29ee923ab5070dd357905cddad2406b6dce9b7ff96aa384b854a07aa32. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:06:51Z), 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/FRX089920305.
Chtchedrine: Anna Karenine (Les Étoiles du Bolchoï)
Glinka: Ivan Soussanine (Les Etoiles du Bolchoï)
Leoncavallo: Paillasse (Les Etoiles du Bolchoï)
Les chefs-d'oeuvre des Étoiles du Bolchoï, Vol. 2
Les chefs-d'oeuvre des Étoiles du Bolchoï, Vol. 1