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 0xfde34b575debcee14e51cc3ce2e4bc7c0b0597b4389df8b368ddc34ee38d6b01. 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/60d3c40f-9b0f-4e97-b629-f5b3be8c90c4.json and https://artists.proofprofile.net/proofs/artist/60d3c40f-9b0f-4e97-b629-f5b3be8c90c4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Classical Music to bring on a desert island
Swan Lake, Act II, Op. 20, TH 12: No. 13, Dances of the Swans, Pt 4. Allegro moderato "Dance of the Little Swans"
Kirov Opera and Ballet Theatre Symphony Orchestra
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 0x38a1457263a56a74aebf820df5c61556548d235b87c5a31861b5e9221cd9c326. 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/FR3KD1505010.
Swan Lake, Act II, Op. 20, TH 12: No. 10, Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee21cac0c906ad028e7265484756d5db9c917ea5ab69bf17e54d082b47bd078. 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/FR3KD1505007.
Swan Lake, Act I, Op. 20, TH 12: No. 2, Waltz. Tempo di valse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed194c627e2b406ab9f34250596065ef9644e7a1e8d4eb3d2922c3906c45ad48. 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/FR3KD1505008.
Piano Sonata No. 11 in A Major, K. 331: III. Alla turca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bb46e735db895a021fde7e9620b1be9e601627226d7b0ad354e14f6391bbc5. 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/FR59R1509549.
Goldberg-Variationen, BWV 988: Variation No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6313a99afe070987ba66409eab3015c9c1760e8fea9bc42bd29371051554100f. 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/FR3KD1504915.
Piano Sonata No. 3, Op. 2 No. 3: III. Scherzo. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4719228cc62377f303ec8b67059b7470c76d58b6d76fecc47fb73698a7f8f5. 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/FR3KD1505091.
Piano Sonata No. 14, Op. 27 No. 2 "Moonlight": II. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb17f6d5c898dd6aabb465845bac44036faa534faf6fac62393b4e2d5b7e9aa7. 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/FR3KD1505094.
Octet in F Major, Op. 166, D. 803: IV. Andante - Un poco più mosso - Più lento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2baa8c91455003bddf86a6c2c99ef0f9fe8c91100cb042022aa3391ae6b9ad5. 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/FR10S1529101.
Eine kleine Nachtmusik, K. 525: III. Menuetto. Allegretto
Ochestre de chambre tchécoslovaque de Prague
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd3730e8a00d14a70c2baf0f5e8aac644bc7b508b3cde574e2332e451055dbe. 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/FR10S1542346.
Symphonie No. 9 in D Minor, Op. 125: II. Molto vivace - Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0353ec7fa95fd3e31f4503cad1ce72ceb97533e7df4006a5c809db4a068a79c. 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/FR6V80528629.
Symphonie No. 9 in D Minor, Op. 125: III. Adagio molto e cantabile - Andante moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ead0ce6724cc65aa84557b4c11d2e3a76fdcb47e78ee06177e033a39601089a. 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/FR6V80528630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed194c627e2b406ab9f34250596065ef9644e7a1e8d4eb3d2922c3906c45ad48. 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/FR3KD1505008.
Aram Khachaturian: La Viuda Valenciana & Masquerade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe99c83c2b3a6a35be21ea826130e49ada1cb86ddff99fd725a0bc0a8e18d9b31. 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/FR3KD1504913.
Quintet for Piano and Violin in A Major, Op. 114, D. 667 "Trout": I. Allegro vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dcc65b92aabfaa4f8045de143ba5c6ff8b6f5c2b2036e2ca94fc50215d95642. 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/FR3KD1505764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bb46e735db895a021fde7e9620b1be9e601627226d7b0ad354e14f6391bbc5. 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/FR59R1509549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fe835589de691f09c6d609753040e7589522f8a6ca729bd325e75b5396068d. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/FR3KD1504974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefd187c55ff4b9c7c463ae8d65ed0fd6108bff4684310d62237d8d54c2bf8eb. 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/FR3KD1504991.
Orchestre À Cordes De La Garde Républicaine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18c3895a6741f7755cf536812394dbd23fd29bdb810b7ab6c4ca9fa7175ea49. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR3KD1507123.
Suite bergamasque, L. 75: No. 2, Menuet - Arr. for Harp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb280b90378484b93d834b92ceee8ff820b83fd011cc15c72269cee82c2ae65. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR4GL1069192.
Petite suite, L. 65: No. 2, Cortège - Arr. for Two Cellos and Harp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c75a81725c5e1da16908d4346b4ef19cb0c09fd6e04d52a3e75f55ae451faad. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/FR4GL1069196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d199038c72994f6eb57df88f078ad422cadd26b779803958024cf8787526e4. 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/FR4GL1069199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d0dd74651122239fb238337a42b2bee2bf8d1a6e4c275dcd22b496d095a02f. 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/FR10S1611431.
Rossini: Il barbiere di Siviglia, La gazza ladra & Guillaume Tell
Il barbiere di Siviglia: "Largo al factotum della città"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65412a8ab81b6eec69b23b19e1cda63a41c97617c1fd8adbfeb6bcd7233ebf51. 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/FR3KD1506429.
Ravel: Boléro, M. 81, Daphnis et Chloé, Suite No. 2, M. 57b, La valse, M. 72 & Rapsodie espagnole, M. 54
Rachmaninoff: Symphonic Dances - Ravel: La valse - Bolero
Pyotr Ilyich Tchaikovsky: Overture and fantasy
Ravel: Bolero - La Valse - Pavane for a Dead Princess