thumb|Trempont in Monsieur Beaucaire, 1956 Michel Trempont (28 July 1928 – 30 January 2021)Le baryton belge Michel Trempont est décédé à l'âge de 92 ans was a Belgian operatic baritone whose repertoi
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 0x5561a2a77e2038ac92ee8012f008da4660e6479a0db9cf81238313d69f0762ba. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d44bf6a-0812-462a-a245-961d0de1068e.json and https://artists.proofprofile.net/proofs/artist/0d44bf6a-0812-462a-a245-961d0de1068e.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Offenbach: La vie parisienne, Act 1: Ouverture - Chœur. "Nous sommes employés de la ligne de l'Ouest" - Dialogue. "À quelle heure arrive le train de Trouville ?" (Chœur, Bobinet, Gardefeu, L'
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 0xab73c48017b59360fdace899789b151eb1705536333992ac6b5d7531826fbb43. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ117605593 — a six-check JSON result.
Offenbach: La vie parisienne, Act 4: Finale. "Par nos chansons et par nos cris, célébrons Paris" (Chœur, Gabrielle, Le Baron, La Baronne, Bobinet, Gardefeu, Le Brésilien, Urbain, Métella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14fa4aa2c62590a94982c84ea4eb247903c54f3b89880c2148a00655b52bbd0b. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ117605498 — a six-check JSON result.
Offenbach: La vie parisienne, Act 3: Finale. "Soupons, soupons, c'est le moment" (Le Baron, Gabrielle, Pauline, Louise, Clara, Léonie, Prosper, Urbain, Bobinet, Chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855c162535494718cbb37b29ba44f7063ee1e0c10c3b6c667c0e7a2dc5d087c0. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ117605494 — a six-check JSON result.
Offenbach: La vie parisienne, Act 1: Chœur. "Le ciel est noir, il va pleuvoir" - Quatuor. "Métella !" - Dialogue. "Gardefeu !" (Bobinet, Gontran, Gardefeu, Métella, Chœur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59a38c3bf96a20a822b142fa2e6602fbf912cb5da1b1d0961b82b74f66ef737. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ117605478 — a six-check JSON result.
Offenbach: La vie parisienne, Act 1: Couplets. "Elles sont tristes les marquises" - Dialogue. "Et maintenant, rue de Varenne !" (Bobinet, Gardefeu, Joseph)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61320c0117210cf5075a60b1004b8c98ef30e67ada5c6ce40aa57ff522c2b6c6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ117605479 — a six-check JSON result.
Offenbach: La vie parisienne, Act 3: "Il faut nous dépêcher vite" - Dialogue. "Eh bien, mes enfants" (Pauline, Clara, Prosper, Urbain, Léonie, Louise, Bobinet)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2302bdff3f151420bd86d1fa81a519280073738e3e842435a21e3423c41c2efa. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ117605489 — a six-check JSON result.
Offenbach: La vie parisienne, Act 3: Septuor. "Donc, je puis me fier à vous ?" - Dialogue. "Allez mes amis, allez" (Pauline, Prosper, Urbain, Léonie, Louise, Clara, Bobinet, Gardefeu, Le Baro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bb4c7c4248db91da5143cdcb5ff9196335e8c84ce83715a9db23bd71f56b8c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ117605490 — a six-check JSON result.
Offenbach: La vie parisienne, Act 3: Couplets. "On va courir, on va sortir" - Dialogue. "L'amiral, mesdames et messieurs" (Gabrielle, Le Baron, Pauline, Louise, Clara, Léonie, Prosper, Urbain
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd8a15a2bfa80cdc8032fda4a938801dbc4fefe183e0ef64c2c447e8200a47f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ117605492 — a six-check JSON result.
Offenbach: La vie parisienne, Act 3: Septuor. "Votre habit a craqué dans le dos !" - Dialogue. "Cher amiral, vous avez de beaux éperons" (Le Baron, Pauline, Bobinet, Gabrielle, Léonie, Clara,
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22904a1adc430047dbbc54c3a7df2b3abbd28527f6dd7cf4dde723f4c6aec98. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ117605493 — a six-check JSON result.
Offenbach: La vie parisienne, Act 4: Chœur. "En avant les jeunes femmes" - Duo. "Hier, à midi, la gantière…" Texte (Chœur, Le Baron, La Baronne, Bobinet, Métella, Gardefeu, Gabrielle, Le Brés
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440e1a67efd3fbedc6f480dfafef79372db3d005e13e74701ac71efb8ac71a1c. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ117605497 — a six-check JSON result.
Offenbach: La vie parisienne, Act 2: Dialogue. "Il est enragé" - Rondo. "Vous souvient-il ma belle" (Gardefeu, Le Baron, Gabrielle, Frick, Bobinet, La Baronne, Alphonse, Métella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07013d3c7f9829ca83b7b946c02b10484414c7ccdd69fac7aa914e0157fe7d9a. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ117605447 — a six-check JSON result.
Donizetti: La fille du régiment, Act 1: "La voilà" - Duo. "Au bruit de la guerre" (Sulpice, Marie, Chœur) [Live]
Chœur du Théâtre national de l'Opéra de Paris
Orchestre du Théâtre National de l'Opéra de Paris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35e74fd208e5530ca01a2d847de59b7d94c01671bd8c546a1b126b73be820c2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ118603608 — a six-check JSON result.
Donizetti: La fille du régiment, Act 1: Chœur. "Allons, allons, marche à l'instant" (Chœur, Marie, Tonio, Sulpice) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf21472b50dff2c431a390045e5964105a6c55f6b27810a56dee876ad3c356e0. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ118603609 — a six-check JSON result.
Donizetti: La fille du régiment, Act 1: Couplets. "Chacun le sait, chacun le dit" - "C'est l'instant de l'appel" (Marie, Chœur, Tonio, Sulpice) [Live]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967fd23e08e688f3b617bad1509916e427b40f56fabf26d7a105c4872a4b0940. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ118603610 — a six-check JSON result.
Donizetti: La fille du régiment, Act 1: Finale. "Je suis soldat" - Romance. "Il faut partir" - Ensemble. "Partons, Marie !" (Tonio, Sulpice, Chœur, Marie, Hortensius, La Marquise, Le Caporal)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d530945b6590fe1412dd78d2fe1d7718a94758d92ab7663278a293cb8e7841. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ118603614 — a six-check JSON result.