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 0x6f4e352f940406af80828976813d32e818f1df7a7065b796b132ea25f2174292. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1a2960da-3b4c-4de7-93ea-535fc005d256.json and https://artists.proofprofile.net/proofs/artist/1a2960da-3b4c-4de7-93ea-535fc005d256.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 0xef5c82b0086471c93640efcc9504a2db067e419568e7222e5b4314c0bf1f2fca. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC0802532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d8bbcc6c4889b22c54d3357072166abcdd267570cfeb530cbc0b6cb7c63b99. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC0802533.
Monteverdi: Scherzi musicali a tre voci: No. 6, Damigella tutta bella, SV 235
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1394515e193d096f12f6de7fb5984fd488d19a07c24383673b0d1ab28deac092. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC0802535.
Monteverdi: Madrigali, Libro VIII "Guerrieri et amorosi": No. 18, Lamento della ninfa, SV 163: "Amor, dicea"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f32956d403c44a09004db8317edf380e855ca010722e6810e0b6fc68dd78f32. 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/GBAYC0802536.
Monteverdi: Sì dolce è'l tormento, SV 332
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272ba600d396a44df61edf71ebee05c8f64dcf49bdad0f236a52d56e963dc02f. 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/GBAYC0802537.
Monteverdi: L'Orfeo, SV 318, Act 5: Sinfonie & Moresca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4cac7e7331cdbd4a4c282b63d5bf8c10d6efbd35fede69815e2d95fa41c6ba. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC0802538.
Monteverdi: Settimo libro de madrigali "Concerto": No. 16, Interrotte speranze, SV 132
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cf6a774cfca623f3a5ee9cac7c1676471c1d576235fcd982a017220938de20. 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/GBAYC0802539.
Monteverdi / Arr. Pluhar: Settimo libro de madrigali "Concerto": No. 27, Chiome d'oro, bel thesoro, SV 143
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452d3b1bb2578f52a40eff71799a0e710bda7a52798096da1b22817db6773fce. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC0802540.
Monteverdi: L'incoronazione di Poppea, SV 308, Act 2: "Oblivion soave" (Arnalta)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c9575a4788690a3cf6078d8bc727f2a190cf6f57478fa447fbfc8375ac1bbf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC0802541.
Monteverdi: Madrigali, Libro VIII "Guerrieri et amorosi": No. 2, Hor che'l ciel e la terra e'l vento tace, SV 147
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc063f54e40444735b76ef2590a7251b7917ec3e9236e7ae5b4b61f691f9a083a. 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/GBAYC0802542.
Monteverdi: Settimo libro de madrigali "Concerto": No. 1, Tempro la cetra, SV 117
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e243e0d8528e25f6f84dbd15c8e0064eb211efafeec968e0019ad52eee2e08. 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/GBAYC0802543.
Monteverdi: Madrigals, Book 8: Ballo, SV 154b
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c08fcacd6a408371007540f98c830564951caf3a26b892eab0e5e0f03d6849. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBAYC0802544.
Monteverdi: Madrigals, Book 7: Con che soavità, SV 139
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009c3571983495c1afac77851a4353639b3494ed9210b5850afc8d705b6401db. 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/GBAYC0802545.
Monteverdi: Madrigals, Book 8: Vago augelletto che cantado vai, SV 156
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc51b1309452c4c29fe277ed426a4a184eb7d66d82691b90ef40548162a5273. 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/GBAYC0802546.
Monteverdi / Arr Pluhar: Zefiro torna e di soavi accenti, SV 251
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21434c4dc51068d2ac36c008ab005d76530b701af11e1cc463a2ab2e3d80d934. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBAYC0802547.
Giuseppe Scarlatti: I portentosi effetti della Madre Natura
Avondano: Il mondo della luna (Excerpts)
Il trionfo d'amore, Introduzione: Introduzione: Sinfonia: Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x303f975e2c1a579a34e96e2b9352154187f13927d4fa44389a9bac27c6593d04. 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/HKI191436502.
Almeida: La Spinalba, ovvero Il vecchio matto
Obras-primas da música clássica portuguesa
O Meu Bloco a Desfilar: Os Sambas de Carlos Miceli Na Voz de João Fernandes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96229b898c72cc589cbab14722673fe865a483f92d2e878473f78bd2bd7ba63a. 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/BRLE01800083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523cf5ea243a58c0ad3bf4664e8bb1d0e2d316f39bb242b41609fd9dbc4f9a2f. 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/BRLE01800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba2482aef687e204d8dd11f4d653759d9e1af2db1a9aac96da51709068512fe. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRLE01800089.
Traditional / Arr. Pluhar: A la fiera de Mast’Andrè. Tarentella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf18eb9f056f800f02d9e07734a5e6d1ca7d5d4bd00c5d6a0fbd178fe818eb70. 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/GBPFW2100133.
Falconieri / Arr. Pluhar: O vezzosetta (Aria sopra la Ciaccona) - L’Eroica
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7146158ed7560150a156e7dba1406db5eacb8c34deeec58f1581526ebeba700. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBPFW2100134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa37fbe03f2d0d641e45895f3676f8e6a84d99502a66c1241a38df7df915e72. 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/GBPFW2100135.
Caresana / Arr. Pluhar: La Veglia: Dormi o ninno (Arr. Pluhar)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0bcb8379440a902af34f1fe6d2764a9613976806bc104d5d3c074eef98c42f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBPFW2100148.
Caresana / Arr. Pluhar: Serenata: La Pastorale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25d2dcf605b4cfa16036ddc13d0c84dec07243f5963786691c86467b22a1010. 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/GBPFW2100152.
Monteverdi : Vespro della Beata Vergine - 1610
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b384404134416754dce4818f8fea1e41ed3229bd8c32e8dda1b4d439068e3b. 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/GB2ED0901402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341edef371a4d29f875d5688222436082c51b43bd8fcd6385f4dd31bc33e1ee9. 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/GB2ED0901411.
Charpentier: Te Deum , Grand Office des Morts
Alla Napoletana - Caresana / Arr. Pluhar: La Tarantella
Les 25 ans !!!: Le Concert Spirituel, Hervé Niquet