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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adb0fd3da24e4a8ffbc76ab7a36b59b0923ec7772592cb84faf22c03a35cb09. Chain 2 (Bitcoin): anchored in block 953636 (2026-06-14T13:03:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/364c91b1-4f89-4ec6-be72-e1a97535850e.json and https://artists.proofprofile.net/proofs/artist/364c91b1-4f89-4ec6-be72-e1a97535850e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf6707bbeeda38aa5ab21e2077f029fd05037d96609148684092bae2745c441. 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/FR46Y2048901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e465b8fa0f1466e5273587542cd5d2bad4ad7db346b36e744f87eee9a484de9. 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/FR46Y2048902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7948e31ed1af8dffb513e33247e7011e722e985271f97983f085dee914eb456b. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/FR46Y2048903.
Missa Hercules dux Ferrariae: II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a156edc1911bdfca8b81e9e6b3fa7b3687273c4f0826d08e5e66da0f3fe335. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/FR46Y2048904.
Missa Hercules dux Ferrariae: V. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5325d8f97269563a1282b67a6c33d2568fcbfcd155a9d9feb81e5cd468627cdc. 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/FR46Y2048909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12dc58ce1dd7ad62311ecab5368344c992a8d8783fa61a714f7c56c961c14026. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR46Y2048913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f93803789a96f3c0bdb38ff4ddb3fb56632b75214be6e5f4a9b011307560063. 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/FR46Y2048915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7850387e2d12829a7a2b9a85cf8401ef18a0e9ce11dc653714e732568f921b6a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR46Y2048916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84455014bf380b1d4e2fbd79f50eb9135f4a65ef42ea8ae7feabbec8db3b75c7. 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/FR46Y2048918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184e48828c28787a4caca139312d339c6170211559535c48c716947641a7d7c6. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/FR46Y2048914.
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
Compère: Missa Galeazescha, Music for the Duke of Milan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc28ff082a4514b1e24db2229bf547be414d032949128f70ab6694fa405dfb1. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR46Y0543604.
La liberazione di Ruggiero dall'isola di Alcina
La liberazione di Ruggiero dall'isola d'Alcina, Prologue: Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31674efcce2ae5b4c2874c185434fbe1bd5510fb875662186842206d8a5653a3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ES7891602201.
La liberazione di Ruggiero dall'isola d'Alcina, Prologue: Biondo Dio del bel Permesso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb285a7ebd8c12785226dd7789f144ff2c6644a49b55643530dddcee2c1a9bed. 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/ES7891602203.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 1: Così, perfida Alcina
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7838c6dd63900e0d94844e599fdf066e2436b2f50db560d4036abb4f69c5cd6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES7891602207.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 1: Qui si può dire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6783f7645ed865d50fd2c38a1dca9339b4a500d16d530a19b070e0cbfbf832. 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/ES7891602208.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 1: Quanto per dolce e mia beata sorte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8898ab5888071a4829c2b56303bf73c0b6cd034329b1f56c1667f402a81fe0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES7891602209.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 1: Rimanti, ò mio signore
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30aff74237410327de9b3ba40d29dcf75aa759cd1881dab5f0a07864d8c5beef. 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/ES7891602211.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 1: Aure volanti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc624b869bae93c62b320743e3b11019185b05d8c525839e3e23648c9dc04e9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ES7891602212.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 1: Per la più vaga e bella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cc87f25e38e3b70632fbdeb952d1abd4a2b44063b2502136afcd795ff124f8. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ES7891602214.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 4: Ballo ("Il cavalier di Spagna" by Magistro Rofino)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd543fdfdf5352ee31063b7374bd029dc38b757e1a623ca9fe76a9142c8e67d3e. 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/ES7891602227.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 4: Ai diletti, al gioire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167196daa8415eed0c16089fbc6564d0bad68d891e98fc9027f9e66c1f17f574. 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/ES7891602229.
La liberazione di Ruggiero dall'isola d'Alcina, Prologue: Non perché congiurati
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9ed5ea5f59afb640b70415d9153fa60d0e62b01999e4d13a1f34c730b367f8. 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/ES7891602202.
La liberazione di Ruggiero dall'isola d'Alcina, Prologue: Tra gli ardori
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102da6e561af2d6587805dc45c7a31f52c0a657d3a93eeec9efc5d011f7e396b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ES7891602204.
La liberazione di Ruggiero dall'isola d'Alcina, Prologue: Poscia che'l cielo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd6ac791de651fe3dfa00c20f3ec19e4eff673f793ff49bfa1dd4aaab8cf771. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ES7891602205.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 1: Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b85877f4fdc2a904acbda68550a015d9310806701d9bf1e4ac634726453111. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ES7891602206.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 1: Quando Amor l'arco vuol tendere
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119a1615de3647884039c761e50ec19e5231a1b92ed98eee9c6350f9d55e74eb. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/ES7891602210.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 1: O quanto è dolce amar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0066d707cbebadf8f55fc46cb3f744be34d7b0234b7247e0849f7e5e79835bee. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ES7891602213.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 1: Chi nel fior di giovinezza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfc03250278a8e903b2aebff47df6b2cdf9dcf71c627c7d32e1b62be0b7e734. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES7891602215.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 1: Il risveglio di Ruggiero
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e763907b046d75f5ec87ef09933737dc38d77b0b91c601ffdc281861cf2764. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ES7891602216.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 1: Ecco l'ora ecco il punto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4f6f5ba5cc57eb39f99bb2122bd29a8887dae51c78b274b3f95ba9dcaca52d. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ES7891602217.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 1: Ruggier de' danni asprissimi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e7a13c2088de3073944d4e1d5ef414a753b7454025e891fc17489834ff7fb1. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/ES7891602218.
La liberazione di Ruggiero dall'isola d'Alcina, Scene 1: O bei pensieri volate
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a078e0e101bb70d9bb187122854659bef44498734630089bb88caf5b9b8cfca. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/ES7891602219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8742c69a1717f89565f227761bd176f41249cfa47b1d13cd902d6c9d342c5d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITO512202302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94cfccc4d0e09fea39265fb2509fa36d764b5c60b9f069c75c1dd4b8cf02b49a. 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/ITO512202303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9569c1195611da8d6f938a8108940fbaa86d0476d2142392b4a0d499769cf0a8. 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/ITO512202304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dd5db95e0700820c4f5204dcdad7db9f5784ee9bf5bcbe8bf6a98b3e3669d0. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ITO512202301.
Willaert e la scuola fiamminga a San Marco (First World Recordings)
Cavalli: Vespero della Beata Vergine, Antifone mariane & Sonate
Di guerra e di pace: Renaissance Music for Winds & Percussion
Cavalli: 5 Magnificat and Other Sacred Works