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 0x7410bdca9854e43ae3cb24140932b245cfc509f8eb768c520ab8be81ff2cb1cd. Chain 2 (Bitcoin): anchored in block 953982 (2026-06-16T17:42:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cf7486a-6736-4222-b01b-da232437151e.json and https://artists.proofprofile.net/proofs/artist/2cf7486a-6736-4222-b01b-da232437151e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
L'Italiana in Algeri (The Italian Girl in Algiers): Sinfonia
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 0xa519d8e5de8b1072e94ea40226992dc6f9260ecd11eed74be268de13ea84a81c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191004401.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 1: Introduzione: Serenate il mesto ciglio - Cavatina e Stretta dell'Introduzione: Delle donne l'arroganza (Chorus, Elvira, Zulm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf981009a1a17012b7034f2d7282ff7f77225c422d5d89a8ef6b9957d9dea115. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/HKI191004402.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 1: Recitativo: Ritiratevi tutti (Mustafa, Zulma, Elvira, Haly)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d0ff7526d25aefd8b45020386d29db994cd22913adf842bdae1f731d07d2f3. 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/HKI191004403.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 3: Cavatina: Languir per una bella (Lindoro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a3961f48631ba227a8838d5ed09bf034fc724c0e609443e83c9ca8fbba39a8b. 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/HKI191004404.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 3: Recitativo e Duetto: Ah, quando fia (Lindoro, Mustafa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5be8b22329a5f01e20a1a343c5147535a630ba732a12c988efc3bf94ed5e89b. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/HKI191004405.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 3: Duetto: Se inclinassi a prender moglie (Lindoro, Mustafa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bde224f437c2a42a88a1c83d9480abda762029acf955cf948c41424fa460e51. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191004406.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 4: Coro: Quanta roba! Quanti schiavi! - Cavatina: Cruda sorte! Amor tiranno! (Chorus, Isabella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652bee6c212a3954867dcae4718166e8ad4fba8afed41ae38117a7f4ee7f2878. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/HKI191004407.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 4: Recitativo: Gia ci siam. Tanto fa (Isabella, Taddeo, Haly)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b45566828adb2dc5cfd892b3253603fa81c909d27776c8a7ad7e1380ecf5729. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191004408.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 5: Recitativo: Ah! Isabella … siam giunti a mal partito (Taddeo, Isabella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24d8973c07a31fb61bfe7f3903f8898add80ce128760ab61e82afa52103b603. 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/HKI191004409.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 5: Duetto: Ai capricci della sorte (Isabella, Taddeo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f896823cc96a4979e4d2033cf63e9e5cbe79f11778f0b2280f5223fa9737d40. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/HKI191004410.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 6: Recitativo: E ricusar potresti (Zulma, Lindoro, Elvira) - Scene 7: Ascoltami, Italiano (Mustafa, Lindoro) - Scene 8: Dunque
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a9bdfea9565976d821b6b2ddc015566c3098421d9beeb7605fe961f02f5df3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191004411.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 8: Aria: Gia d'insolito ardore nel petto (Mustafa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf58d75ebd91e8e122bf4fefb73ec0cb6c48b00f1467956df5ab9214c50c1b89e. 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/HKI191004412.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 9: Recitativo: Vi dico il ver (Zulma, Elvira, Lindoro)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d88568bce4d59c81fd105e8928061b9c041020f761e9995c1c512886e11c98. 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/HKI191004413.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 10: Coro nel Finale I: Viva, viva il flagel delle donne (Chorus, Haly, Mustafa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd64f4bd91717540ac728a5a055559ef5b96d70cd834254ca02c70633cedea57a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191004414.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 11: Duettino nel Finale I: Oh! Che muso, che figura! (Isabella, Mustafa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a190269c05882ec00f804ebdaadea0317f6bd60ed8bd7a2d1934a0aa4bc854. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/HKI191004415.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 12: Quartettino nel Finale I: Vo' star con mia nipote (Taddeo, Haly, Mustafa, Isabella)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb032330c9f321d22f663ab2296b951abc1337743a76771ea692fa58554673c. 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/HKI191004416.
L'Italiana in Algeri (The Italian Girl in Algiers): Act I Scene 13: Settimino: Pria di dividerci - Seguito e Stretta: Va sossopra il mio cervello (Zulma, Elvira, Lindoro, Isabella, Mustafa, T
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee9696a83a57c8c62a34590cf6b18e1cb7968de4d4a2fd7e37d365f04edf37dd. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/HKI191004417.
L'Italiana in Algeri (The Italian Girl in Algiers): Act II Scene 1: Introduzione: Uno stupido, uno stolto (Chorus, Elvira, Zulma, Haly)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc58bd4d9651b58521a819f2a539c5903b0a31048a444cf4c39a3a86ee05e26a. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI191004501.