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 0x5b4c96e18691b149661e4d6ed3c22eac807c42744b969cae7291700aa960c4e1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd83cac2-4200-4c3a-9d7b-a359c02e7ae2.json and https://artists.proofprofile.net/proofs/artist/cd83cac2-4200-4c3a-9d7b-a359c02e7ae2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Il Canto d'Orfeo (Early 17th Century music inspired by the Orpheus myth)
The Brockes-Passion: 2a. Recitativo. "Als Jesus nun zu Tische saße" (Evangelist) - 2b. Accompagnement. "Dieß ist mein Leib" (Jesus)
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 0x4f3fffd65f86d49c44634f69797cd4321d857021f2fe3061a771411eabe4b526. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/DEY321303002.
The Brockes-Passion: 4a. Recitativo. "Und bald hernach nahm er den Kelch" (Evangelist) - 4b. Accompagnement. "Diß ist mein Blut im neuen Testament" (Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x749e849c63905c6876433f99b87a635d64c0e09834e9eb92bd784ace6bd3b30e. 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/DEY321303004.
The Brockes-Passion: 7. Recitativo. "Drauff sagte er dem Höchsten Dank" (Evangelist, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff79970428ef3fa056163934fcccfd27795bcc90c3d05ad431968271fa5786ad. 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/DEY321303007.
The Brockes-Passion: 15. Recitativo. "Die Pein vermehrte sich" (Evangelist)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e028f58b402c8950656b3a325f28a79b7464d25daf955aecc000a5dace5a61. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/DEY321303015.
The Brockes-Passion: 17. Recitativo. "Ein Engel aber kam" (Evangelist)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa854fc6ad27525cdd217a4ad546943a17ea5bb21dfc72bab4cf1906897cbaa68. 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/DEY321303017.
The Brockes-Passion: 20a. Recitativo. "Und der Verräther hatte dieses ihnen" (Evangelist, Judas) - 20b. Chor. "Er soll uns nicht entlauffen" (Chor der Kriegs Knechte)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc829886f156a5552fae950038ade128593e21c7fdae7992133e1153d64db549f. 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/DEY321303020.
The Brockes-Passion: 27. Recitativo. "Und Jesus ward zum Pallast Caiphas" (Evangelist, Caiphas, Jesus, Kriegs Knecht)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a90db8740f36986412b9bca32a5d44dd2991903409a4f8cc053815e44bc032. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DEY321303027.
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 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/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 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/DEY321303031.
The Brockes-Passion: 36a. Recitativo. "Wie Jesus nun zu allem was geschah" (Evangelist, Caiphas, Jesus) - 36b. Chorus. "Er hat den Todt verdient"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x006da17e05c68f643a8865c88ee553d21a372c4ccebcf7c9c0e4fc68e26df1db. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEY321303036.