1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0x2126578f0ca42f29e272e3093efc8f89af391b82acbd1a8b98e3fad848dd3fcf. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a55c9430-3851-462e-b556-1d99457325d2.json and https://artists.proofprofile.net/proofs/artist/a55c9430-3851-462e-b556-1d99457325d2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mefistofele, Act I, Scene 2: Dai campi, dai prati
La Gioconda, Act II, Scene 4: Cielo e mar!
Adriana Lecouvreur Act II, Scene 2: L'anima ho stanca
Adriana Lecouvreur Act I, Scene 5: La dolcissima effigie
Andrea Chénier, Act IV: Come un bel dì di maggio
Andrea Chénier, Act I: Colpito qui m'avete ... Un dì all'azzurro spazio
Cavalleria rusticana, Scene 11: Mamma, quel vino è generoso
La fanciulla del West, Act III: Ch'ella mi creda libero
Madama Butterfly, Act III: Addio, fiorito asil
Pagliacci, Act I, Scene 3: Recitar! ... Vesti la giubba
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. GET OTSBitcoinBlockVerifyURL → block OTSBitcoinBlock must exist at that height 3. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 4. GET OTSVerificationAPI → pre-computed 6-check result from server 5. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8083522ad4c19e2cd518217eb82ba60d60de6333508c89715d0ceffd8b2697. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/1UiqesRqzxKk8bxUDeDO0l.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/1UiqesRqzxKk8bxUDeDO0l.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ae734635e4219df77c2ca879b08aa6752578a07bd155716f9a3e341cb4edc6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7ECS2A9k4WnOdbzFTDT2k4.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7ECS2A9k4WnOdbzFTDT2k4.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acdd08222aa2bc80be092537cd7d53ce1671797d2cc90ba098f28b8a13c507e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/663wIDkTK97jpdxS2SDok3.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/663wIDkTK97jpdxS2SDok3.
Brigitte Klassik zum Genießen: Vittorio Grigolo
L'elisir d'amore, Act II: Una furtiva lagrima
Carmen, Act II: La fleur que tu m'avais jetée
Manon Lescaut, Act I: Donna non vidi mai
Romeo et Juliette, Act II: L'amour, l'amour...Ah, lève-toi soleil
La Juive, Act IV: Rachel, quand du seigneur
Faust, Acte III, scène 4: "Quel trouble inconnu... Salut, demeure chaste et pure"
Manon, Acte II: "En fermant les yeux... C'est un rêve"
Manon, Acte III, scène 2: "Je suis seul... ah fuyez, douce image"
L'Africaine, Acte IV: "Pays merveilleux... O Paradis"
Les Contes d'Hoffmann, Epilogue, scène 2: "O Dieu de quelle ivresse"
Romeo et Juliette, Acte IV: "Va! Je t'ai pardonné... Nuit d'Hyménée"
Le Cid, Acte II, scène 3: "Ah! Tout est bien fini... Oh Souverain, o Juge, o Père"
Romeo et Juliette, Acte V: "C'est là! Salut! Tombeau! Sombre et silencieux"
Fermarono i cieli - antica melodia napoletana
Messe à troix voix, Op. 12: Panis Angelicus
Pueri Cantores della Cappella Musicale Pontificia detta Sistina
Ave Maria, "Ellens Gesang III", Op. 52/6, D. 839
La Sérénade de Schubert - Ständchen D 957/4
Festliches Adventskonzert aus der Dresdner Frauenkirche
Laudate Dominum (from Vespere solennes de Confessore)
Domine Deus (from Petite Messe solennelle)
Cum Sancto Spiritu (from Petite Messe solennelle)
Rejoice greatly, o daughter of Zion (from Messiah, HWV 56) - Live
Ouverture miniature (from The Nutcracker Suite)
Luisa Miller, Act II: "Quando le sere al placido"
{"copyright_id":"0x0b3a12fc58304f97d8f66b10fcd5bab552333937fbc7239d8ed81b937894fdcb","isrc":"USSM11002209","name":"L'elisir d'amore, Act II: Una furtiva lagrima","registered_at":"2026-06-09T06:32:37Z","spotify_id":"7yj0R3stNE8ypTpwxDaLMI","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3a12fc58304f97d8f66b10fcd5bab552333937fbc7239d8ed81b937894fdcb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/7yj0R3stNE8ypTpwxDaLMI.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/7yj0R3stNE8ypTpwxDaLMI.
Rigoletto, Act II: Ella mi fu rapita...Parmi veder le lagrime
Rigoletto, Act II: Ma dove or trovarsi... Possente amor
Gianni Schicchi: Firenze è come un albero fiorito
Il Corsaro, Act I: Tutto parea sorridere
Il Corsaro, Act I: Si de' Corsari il fulmine
Un ballo in maschera, Act III: Ma se m'e forza perderti
{"copyright_id":"0xc68aae39775c9cb067805fb1333d839066f341de540a39fb2061af92b5e3ec06","isrc":"USSM11002218","name":"Tosca, Act III: E lucevan le stelle","registered_at":"2026-06-26T19:10:25Z","spotify_id":"4ktPfTUJlAVDuVWUG1lAdP","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68aae39775c9cb067805fb1333d839066f341de540a39fb2061af92b5e3ec06. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4ktPfTUJlAVDuVWUG1lAdP.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4ktPfTUJlAVDuVWUG1lAdP.
Il trovatore, Act III: Ah si' ben mio coll'essere
{"copyright_id":"0x0b3a12fc58304f97d8f66b10fcd5bab552333937fbc7239d8ed81b937894fdcb","isrc":"USSM11002209","name":"L'elisir d'amore, Act II: Una furtiva lagrima","registered_at":"2026-06-09T06:32:37Z","spotify_id":"4QwWx0SpDgNkwur1FrrKYn","type":"track"}
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b3a12fc58304f97d8f66b10fcd5bab552333937fbc7239d8ed81b937894fdcb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. Bridge: the canonical record at https://artists.proofprofile.net/proofs/track/4QwWx0SpDgNkwur1FrrKYn.json contains the same CopyrightID — hash it and compare to OTSHash, then confirm the Bitcoin block independently via OTSBitcoinBlockVerifyURL or https://artists.proofprofile.net/api/v1/bot/ots/verify/track/4QwWx0SpDgNkwur1FrrKYn.