Susanne Mentzer (born January 21, 1957) is an American operatic mezzo-soprano. She is best known for singing trouser roles, such as Cherubino in Mozart's Le nozze di Figaro, Idamante in Mozart's Idome
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 0xdc3146c4a2f9c1ee4c84551bd8becfd47eb3f2887c1d936efe1aca0ad51cf328. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab8d2ee1-a5a5-474a-8507-b80a0d5bbaa8.json and https://artists.proofprofile.net/proofs/artist/ab8d2ee1-a5a5-474a-8507-b80a0d5bbaa8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mozart: Idomeneo (Complete Mozart Edition)
Idomeneo, re di Creta, K.366 / Act 2: "Odo da lunge armonioso suono"
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 0x40812a6306b7fdd121bf417b7f8117dc34bdcdb16933b6ab4781e150e5f61fe2. 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/NLA509000725.
Cavalleria rusticana: Intermezzo sinfonico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d73084dd6b15bff3417bbfad17254ef30c526ecec81618d42306238b174b3c2. 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/DEF058930801.
Mendelssohn: Le Songe d'une nuit d'été, Op. 61 - Britten: Nocturne, Op. 60
Mendelssohn: A Midsummer Night's Dream, Op. 61, MWV M13: No. 1, Scherzo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81be82c677a71bfd44b785b27c3d88c4547a6348307f5e59ff49b75ef48fda0f. 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/GBAYC9000292.
Mendelssohn: A Midsummer Night's Dream, Op. 61, MWV M13: No. 2, Fairies' March
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e89e037901c0b9cac28e6ba4d68ace6b48e1d8d324b7ccc6a19ae2d7070445. 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/GBAYC9000293.
Mendelssohn: A Midsummer Night's Dream, Op. 61, MWV M13: No. 7, Nocturne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41739c636044867ae95f14de9078c5a4959113029e770837b009c2e3702d8830. 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/GBAYC9000296.
Rossini: Petite Messe solennelle; Messa di Milano
Mozart: Le nozze di Figaro, K. 492 (Highlights)
Mass in C, K.317 "Coronation": 6. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7c04175f96641e7c905b2d5ebb3deddd4f7d6c5c1ae6da027978a352d88b03. 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/GBF078300236.
Decca Masterpieces: Mozart - The Great Choral Works
Litaniae de venerabili altaris sacramento in E flat, K.243: 7. Viaticum in Domino morientum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe302c494c7ef908f43bed41e183cd45001b1098648f9d4949e0d5c80271dde62. 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/GBF078010767.
Mozart: Coronation Mass/Missa Solemnis/Mass in C
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7c04175f96641e7c905b2d5ebb3deddd4f7d6c5c1ae6da027978a352d88b03. 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/GBF078300236.
Mozart: The Da Ponte Operas. Le nozze di Figaro, Don Giovanni & Così fan tutte
Mozart: Le nozze di Figaro, K. 492, Act 1: Aria. "Non so più cosa son, cosa faccio" (Cherubino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990aa1744cc8bb941df89a975d00ed930549b261ec144a41ee05df87f6ef21cb. 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/GBAYC8600635.
Mozart: Rarities & Surprises (Complete Mozart Edition)
Mozart: Complete Edition Box 17: Theatre & Ballet Music
Mozart: Don Giovanni, K. 527, Act 1: Introduzione. "Notte e giorno faticar" (Leporello, Donna Anna, Don Giovanni, Il Commendatore)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72715be7f8500543268c754da7df8cf9b8045f76e75df5fc619df4c7b5f8272d. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBAYC9004364.
Mozart: Complete Edition Box 14: Middle Italian Operas
Rossini: Il Turco in Italia (Highlights)
Madama Butterfly, Act I: Vogliatemi bene, un bene piccolino (Pinkerton, Butterfly)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4ba5854cc26fc321a5ec582165e8a2f1798e45b0f1f3e5ee8adf6d09e90d63. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBAYC8600150.
Orchestre Du Theatre National De L'Opera Comique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b69242f084c8640c3b678a87fe1aeefdc7d8f6efa026a4a6851c499bfdbac14. 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/FRZ117006505.
Les Contes d'Hoffmann, Act II: Belle nuit, ô nuit d'amour (Barcarolle)
Orchestre De La Société Des Concerts Du Conservatoire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77227d7be299345ba146e061bcf0bad181d1358f734641f748ca493c7609c23. 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/GBAYC8900746.
Chabrier: A la musique, La Sulamite, Gwendoline, Larghetto pour cor, Valses romantiques & Habanera
Mozart / Compl. Beyer: Requiem in D Minor, K. 626: II. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e47e6ea65a6d7679700f6204d02cfaada54c74a850ebf0a3e6f75b9abd3bb89. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBAYD8900802.