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 0x9fe61e1de7e0276498a267e5af61968123c360eeaa719ae551775fa85293cca8. Chain 2 (Bitcoin): anchored in block 953930 (2026-06-16T10:36:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e66b1f6-d99c-414e-9cec-9e4f5a0e37b0.json and https://artists.proofprofile.net/proofs/artist/1e66b1f6-d99c-414e-9cec-9e4f5a0e37b0.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Scarlatti, A.: Euridice Dall'Inferno / La Concettione Della Beata Vergine
La sposa dei cantici, Pt. 1: 1. Sinfonia, Largo-Presto
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 0xfcc8df203fc4fa471cdd69500dbdc0310ec0081e37ed746c28203d1ca79eaaa3. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300301 — a six-check JSON result.
La sposa dei cantici, Pt. 1: 1. Sinfonia, Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1301ed81f87019515fd0a6738ae4ec3e187e865d6eea9428baa8c086a75fce3d. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300302 — a six-check JSON result.
La sposa dei cantici, Pt. 1: 2a. "Se la fiamma che m’avviva"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc346025179fa0149bb6f163ccbe52258bd7c77cd7caa332cc84569c1847faed1. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300303 — a six-check JSON result.
La sposa dei cantici, Pt. 1: 2b. "Lumi dolenti, lumi"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeebba303eaea694b323a8cccd74a889c3975d1f9d44138509c298d63e1233401. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300304 — a six-check JSON result.
La sposa dei cantici, Pt. 1: 3a. "Dorme la mia diletta"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea6df7a3f439ba7ef65dc5b41ded267cb85d5284e53766f7c67b43c2d3adb2e. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300305 — a six-check JSON result.
La sposa dei cantici, Pt. 1: 3b. "Qui fra tanto ai fiori in seno"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3c03cad9ad739916fde9816fab645e68d6ad7773dd92cf6195d2aa1120d431. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300306 — a six-check JSON result.
La sposa dei cantici, Pt. 1: 4a. "S’ama sì la tua sposa e se tu l’ami"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23369f9417005113950b8b79f8fc53dadf06650a591d76a9b945a8179c4bbee. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300307 — a six-check JSON result.
La sposa dei cantici, Pt. 1: 4b. "Come il sol nei rai nel fonte"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790749e81e44f124472b68c529229384b8afe89ac6c2226f877a5d12a61dc988. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300308 — a six-check JSON result.
La sposa dei cantici, Pt. 1: 5b. "Ohime qual tormentosa"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b35179d5374fb7104cfec2a0df6a4101f7f5d870fea8f711fc37184c9dddb39. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300310 — a six-check JSON result.
La sposa dei cantici, Pt. 1: 5c. "Fide amiche donzellette"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee18eb22a99d2f26fd01466a0477b7c5e942155c363452b621715c51dc0a6a35. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300311 — a six-check JSON result.
La sposa dei cantici, Pt. 1: 6a. "De passati tormenti, in sogno ancora"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbd32310dc10f76e203bd604a2ba36cb737c9c300d10bbad99e3de40458eb9a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300312 — a six-check JSON result.
La sposa dei cantici, Pt. 1: 7b. "Non fidarti del tuo ciglio"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02ed05541df899d574fd5a6516ed8d4d3ae31f77fd7c7fcec3207b042e8095a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300315 — a six-check JSON result.
La sposa dei cantici, Pt. 1: 8a. "Per monti e valli"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980df2417e1d07217fa2722c2f0cd85e2fae4cef0b9233762101707c2d9d934d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300316 — a six-check JSON result.
La sposa dei cantici, Pt. 1: 8b. "Dunque fa ch’al alto impero"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e749d1a07ef23792156c463ca4440c3ec18e5245a7c1a9be476091859301e30. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300317 — a six-check JSON result.
La sposa dei cantici, Pt. 1: 9b. "Mi dirai tutte le pene"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea4a694c73cecfd06394c2b597212e00b4d9b56e0a86f9337003a020f29efb17. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300319 — a six-check JSON result.
La sposa dei cantici, Pt. 1: 10. "Meco al pari e chi disprezza"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85fd209c8b3ee1f8cc96765cc0401c5514527ee8aaf4776ff2dc157d41f8e17. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3EU2300320 — a six-check JSON result.