Hérold, engraving after Louis Dupré|thumb|alt=lithographe of white man, clean shaven with neat, short curly hair, bespectacled and holding music manuscripts Louis Joseph Ferdinand Herold (28 January 1
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 0x084d44fbe1f9f5efddf4f64860ff249c18efdcc3096ecbf646e8b21d38a01215. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fc5a365-b4f1-425a-a5e0-8fe3966ac46d.json and https://artists.proofprofile.net/proofs/artist/9fc5a365-b4f1-425a-a5e0-8fe3966ac46d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ballet Highlights - The Nutcracker, Romeo & Juliet, Swan Lake
The Nutcracker (Suite), Op. 71a, TH. 35: IIa. March
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 0x6ba50387dfcc63a021ec362e6208722c679177bc8baca6dff4198eae75f0da5d. 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/DEF057801283.
The Nutcracker (Suite), Op. 71a, TH. 35: IIb. Dance of the Sugar-Plum Fairy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475fd7e8eb31d9170ba45b1379b808e62fef9c90325b7b317d3d17ac4b1db6a6. 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/DEF057801284.
The Nutcracker (Suite), Op. 71a, TH. 35: IIc. Russian Dance (Trepak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f07ee0fdc450484234088b21a11a737fb45048a5cacb6606e37273bc505f5dd. 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/DEF057801285.
The Nutcracker (Suite), Op. 71a, TH. 35: IIe. Chinese Dance (Tea)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dce34f69f289dbb769b062925e7afb7e8b9eed92e5753706285f258756e691. 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/DEF057801287.
The Nutcracker (Suite), Op. 71a, TH. 35: IIf. Dance of the Reed-Pipes (Mirlitons)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7541f32399eb3379fa7e93048be69161dda6f328c9470e6ab87183179716a9ec. 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/DEF057801288.
La fille mal gardée (Rev. Lanchbery), Act I: No. 17a, Clog Dance
Orchestra of the Royal Opera House, Covent Garden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeefadd1066abdc9b10373f88d2ace8ae2ac8e9e7af01fbf3f6d29c4df05483a. 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/GBF078342117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5d2115ef1775aa93ec5c0d7ea4d058b9085b26f9491028697ec08974be7b29. 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/DEF056102242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2f36f0881616275839a2c3e960d79a6eae9d7319e4424f8f37ac203bce0964. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEF059603760.
Romeo And Juliet, Ballet Suite No. 1 - Op. 64a:5: Masks
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1357d8ccc953a9d1ecc1537c69f23de12cabe907f343453a57bd0874d2c90d59. 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/DEF059330207.
Romeo and Juliet, Op. 64: Montagues and Capulets (excerpt)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe618ae851d52996990bb07c4e60ebfd9f06e91adde77466914b0d293a17f73f7. 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/DEF059330216.
The Sleeping Beauty, Suite, Op. 66a, TH 234: 2. Pas d'action: Rose Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8631feca6b33e3ebaaa12daf7554205ecf45a54c70eeefc056d4c0cb1eef3320. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEF059004233.
The Sleeping Beauty, Suite, Op. 66a, TH 234: 5. Valse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14571cde7b73b73df12204a45346e1af564355019da602a232f39e4645d945e4. 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/DEF059004231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0f1b41b4ca36d8210449959e12bbf464c93493ee0827bca6091dcce3176612. 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/DEF058703338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70764b3ad12e16f55ed37f7fc5eb6339610bf192a4c7373c2460782f61477c7b. 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/DEF059430412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39fd931824b2a504bfcc663e62df3bb4de526f6cbacf241e1c9becf8f27c0e9. 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/DEF059430416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91dd1793d23b1e468a0113154b8ecbf33387b18b2bfcaaa86ae4cf66047c98a. 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/DEF058802501.
Les Sylphides (Orch. Douglas): II. Nocturne No. 10 in A-Flat Major, Op. 32 No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe585f3cdd82f05056c92fa6237676eaf84d962545b0025499c786247438e4539. 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/DEF056102252.
Les Sylphides (Orch. Douglas): VII. Waltz No. 7 in C-Sharp Minor, Op. 64 No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5463b1efe7d85a7d1fbad29a40bafac69a75eea06104000817af4a2b25de15e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEF056102254.
Faust, CG 4, Ballet Music: VI. Variations du miroir. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb43c5f9ca4d5a76d2a49e8dcbaf94281df31c4baa80e4909f3d148ca3a0dc25. 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/DEF057101246.
Swan Lake Suite, Op. 20a: I. Scene "Swan Theme". Moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88796cdfd0ad29b128c7f212768193d285a4b1860cf40ceb83a7746d855489eb. 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/DEF057101680.
Swan Lake Suite, Op. 20a: III. Danse des cygnes. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e254d71949b478484ec8a634febbea11953336d96b5f5884a5ea35d8ff32961. 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/DEF057101682.
Swan Lake Suite, Op. 20a: VI. Finale Scene. Allegro agitato – Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a29627796fd5e5e0dfc820d0e155bb047b042eff80b1ce8d01d86f3139f081f. 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/DEF057101685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeefadd1066abdc9b10373f88d2ace8ae2ac8e9e7af01fbf3f6d29c4df05483a. 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/GBF078342117.
Orchestra of the Royal Opera House & Covent Garden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77399050c7466228d721c35e69c3858fe35486a517beebf690d690eade11efb. 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/USX761321304.