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 0x439f8378650f6bb6ac0af90dc9fe75d9bd0a1658970af3ca89801e11ea3d549e. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8c3e95a9-a1ba-4b00-b417-871b602ca460.json and https://artists.proofprofile.net/proofs/artist/8c3e95a9-a1ba-4b00-b417-871b602ca460.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Monteverdi: Il ritorno d'Ulisse in patria
Il diluvio universale, Act II "In Terra": Dolce sposo Noè
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 0xfd25594b08dc1c23d7ecb172a92a223f5dbce8bd3b28d90709507ea29a2d7c41. 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/FRZDG1100660.
Il diluvio universale, Act II "In Terra": Motor Divino
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d58b2cfcd227cdd5095834fc218426e33e856d5fe4c22b1c4ae0cb91598263. 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/FRZDG1100663.
Il diluvio universale, Act II "In Terra": I tuoi decreti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b76f750e5f4f875f6790f5fc492b08c615b4e95f633b67d9c5019a7deb7b92f. 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/FRZDG1100665.
The Brockes-Passion: 10. Recitativo. "Auffs Wenigste will ich" (Petrus, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742e9edcf603f8e9d96f085f0113f2eac9b4fba29c9c9fec0a14a0d722ad65e0. 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/DEY321303010.
The Brockes-Passion: 18. Aria à 4. "So wachet doch, erwachet doch" (Jesus, Petrus, Jacobus, Johannes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45bd879ff481ed0eb0339d5177d0894531ffd9c8ec997cdd8222f5b5ad16736. 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/DEY321303018.
The Brockes-Passion: 29. Recitativo. "Diß sahe Petrus an" (Evangelist, Erste Magd, Petrus, Zweite Magd, Dritte Magd)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0937fdf8587939000fcf72875fd7a60ff40e4f02819eef42181b827cc2ee4730. 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/DEY321303029.
The Brockes-Passion: 31a. Recitativo. "Drauff krähete der Hahn" (Evangelist) - 31b. Accompagnement Soliloquio. "Welch ungeheurer Schmerz" (Petrus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45aa38628c6f5e910f0dbe3374841e02da01f9e3e934838949e33241ba8cee4. 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/DEY321303031.
Il diluvio universale, Act II "In Terra": Il Gran Dio di pietà
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf983e6b2087a37780e355b6953f11ae28d950936ab221bf2cc2ed453e3924a9b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRZDG1100661.
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
Il diluvio universale, Act II "In Terra": Divin Monarca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f9664ee94f80d10f3cac02184ff1db011ccfe9205a7b974070cff1576d361f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRZDG1100662.
Il diluvio universale, Act IV "In l’arca di Noè": Placati Dio di bontà
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f954383d89c92bdab8a02a6a8ea8d6d657177f0b54d34cb8fdb036ad10498d9. 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/FRZDG1100677.
Il diluvio universale, Act IV "In l’arca di Noè": Cangia dolce mio Dio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b5242f670a954180458758d235485a97d99769d97fdc2872a7c24e50f3e8a6. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRZDG1100679.
The Brockes-Passion: 22. Aria. "Gifft und Wuth, Strahl und Flut" (Petrus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe780f2bc166faa5d756132bd17934666d8c2346ad0f61481e9e75d09584100ea. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEY321303022.
The Brockes-Passion: 25. Recitativo. "Wo flieht ihr hin, Verzagte?" (Petrus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1e8cc8fddc39a20291b6fbab048cf3733652cd70f7fbd5d19e4b8705f8644b. 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/DEY321303025.
The Brockes-Passion: 26. Aria. "Nehmt mich mit, verzagte Schaaren" (Petrus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cda1662736358f8482911da03a1db18a22e213c58aee0d2a9e16f7102d0004a. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEY321303026.
Meine Freundin, du bist schön: II. Ciacona. Mein Freund ist mein - Wo ist dein Freund geblieben ?
Bach & Böhm: Music for Weddings and Other Festivities
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33bdf057d26841a7aff193ceaa96cf52f9c6ab4082c78857df118ed09e30c79. 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/BER181132316.
The Brockes-Passion: 33. Recitativo. "Doch wie, will ich verzweiflend untergehn?" (Petrus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2b0a06ec191b8420cf94f46297dd54a7982ebcec8c08fab271ac856e042e14. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEY321303033.