Ludwig Minkus (), also known as Léon Fyodorovich Minkus (23 March 1826 – 7 December 1917), was an Austrian composer of ballet music, a violinist and teacher of music. Minkus is noted for the music he
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6f663c0401a3021591f8c569bfc571847c31bc3a02b83863245f004ac86336. 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/c1066a88-7a0e-468f-b090-3ae83eeea6bd.json and https://artists.proofprofile.net/proofs/artist/c1066a88-7a0e-468f-b090-3ae83eeea6bd.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcafa643153c7e6062d3bff3acc62e61cdfd3533c90f394c18bdc0474c307e56c. 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/GBF078441101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1a4b7db0976129621450124270e911faef17ef15a5b407095ccdab2a4d7aff1. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/GBF078441102.
Coppélia / Tableau 1: 2. Scène (Swanilda et Frantz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc494406fbd8da430ea14cadead1c08c16974316f25d84f62fa5f6a956c14f8cc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBF078441103.
Coppélia / Tableau 3: 20. Fête de la cloche: 1) Valse des heures
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20a3bb2ef67113703e2ae1b0856b65cb66be24c2f7601c46c5b7b6a697be842. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBF078441123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4e5d339a184d435ab61d13497e0705b31b9a0a4f2b76008faa0c368f6eeb83. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBF078441104.
Coppélia / Tableau 3: 20. Fête de la cloche: 4) Le travail (La fileuse)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8125421dfae52ef6b35b401d838e2498d4bbfe12fc07daf16fa6fd2713a943b. 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/GBF078441126.
Coppélia / Tableau 1: 6. Thème slave varié
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1078bd443c727c0cbc0262764a196e1d9c5fbf33d033c0f2c01de6f7fe9e58ea. 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/GBF078441107.
Sylvia - Act 1: No. 3 Les chasseresses (Fanfare)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3082a10f87eb1bfddefde92a447e9004e0d792a0b63394864385ba4413da0cb. 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/GBF077240304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6496e0a6b3d7d98028f7471f5547b941e3e4aaf7da0ac9008dcfcb8af811dc85. 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/GBF077240306.
Don Quixote, Act III, Pas de deux: Coda (Arr. John Lanchbery)
The Australian Ballet - The Music of the Dance: Celebrating 50 Years
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9419e1c26ed8a7c48cc60a2fcf2da4a84e4692ab46b89d3ec856a522b6386a6. 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/AUAB09950523.
Don Quixote, Act III, Pas de deux: Adagio (Arr. John Lanchbery]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d534341dab93ae991cde558c4e01571905b1125a808cd89a80b695c4f088ca2. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/AUAB09950527.
Don Quixote, Act III, Pas de deux: Entrée (Arr. John Lanchbery)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf032510e74d5b7e62fc3180e20a464582b3ad76b516977d9cc396b8c7ac225. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/AUAB09950526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006688b1dbb33c8703cd94c85b424f76d703dc854cf9372a7d44355753697f0b. 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/GBF076210991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca76d40c134d5fce6f2894b8bd3d42f9d76b8f579de2244fc2eb8ed6a1991130. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBF076211000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc36c5d166fdb987446525298907aa1c61c116c5af36007b4c7cd382dded249d. 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/GBF076411381.
Don Quixote: Kitri's Variation (Arr. Hough)
Stephen Hough's Dream Album: Piano Bonbons
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88a849812191bdcf5414d03abe5ae48b349a08a49592a128af0cc546221ecd2. 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/GBAJY1717604.
Don Quixote: Dulcinea's Variation (Arr. Hough)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01125e5feee03059a854e49b286a6a9eb476911ada834d1374917762749fa933. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBAJY1717605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118db12baa041aa4a42acc4241d7fe8a16606ed0ecdd42dd7db473f253c33374. 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/GBF078842101.