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 0x4df496be7827fe691e6645c187f3f96a6c29824dd724f86bf371c6e34232a312. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/79a61786-dfc5-4996-abcc-12cace6648b0.json and https://artists.proofprofile.net/proofs/artist/79a61786-dfc5-4996-abcc-12cace6648b0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Johann Sebastian Bach: Osteroratorium BWV 249 & Himmelfahrtsoratorium BWV 11
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 0xf0be06036290c8ba6cf042b2b136e1528da0a561a0adbaa755461ae1e59763b2. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/DEB111500501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0acd042fd627d30c505a809668320633fdd297b7e2c83ce5954e6df35e8280df. 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/DEB111500502.
Oster Oratorium, BWV 249: III. Duetto e Coro: "Kommt, eilet und laufet"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1f99f02d06df9af0203df2ecaf9f9cd9a42e24d0cec67fc555d389e71c911b. 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/DEB111500503.
Oster Oratorium, BWV 249: IV. Recitativo: "O kalter Männer Sinn"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8bf542f3344ce584cbc1303c214372212e14098e822e9612f753ed7c79ca41. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111500504.
Oster Oratorium, BWV 249: V. Aria "Seele, deine Spezereien"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99e728ffc9025d9ac86940cabaa28821d28a909f1cd71c274a17feb3a974881. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEB111500505.
Oster Oratorium, BWV 249: VI. Recitativo: "Hier ist die Gruft"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8617ca63ae5ebdb495d7df268b974f1ffb204a11eb981a490633ac225df3e83. 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/DEB111500506.
Oster Oratorium, BWV 249: VII. Aria: "Sanfte soll mein Todeskummer"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8eeec62a7e768bf1953b32b65dbd8a1573b8b815c9b01dc7fd24af218466f2. 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/DEB111500507.
Oster Oratorium, BWV 249: VIII. Recitativo: "Indessen seufzen wir"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125dbec933eac5ccdbb865af5fba9da14f94e09d5f198cb6136aa3027cd4d2ad. 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/DEB111500508.
Oster Oratorium, BWV 249: IX. Aria: "Saget, saget"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678103fe31c30310692547ab693e96bfbe74fe86e6c25ba2a054a7c8c182044e. 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/DEB111500509.
Oster Oratorium, BWV 249: X. Recitativo: "Wir sind erfreut"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4102471f2a504613d47c254cf86fa7eac88233948e6dc7b13fbcedececa43178. 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/DEB111500510.
Oster Oratorium, BWV 249: XI. Chorus: "Preis und Dank bleibe"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2969f94df6aa07f3ab0538a4a13e52c7a193e57096bf578755eeccc99052408. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEB111500511.
Lobet Gott In Seinen Reichen, BWV 11: I. Chorus: "Lobet Gott in seinen Reichen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37546e831e49cf01a070b22c5c73b4db2ea9972b3dd582c477f9032634e0b43d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEB111500512.
Lobet Gott In Seinen Reichen, BWV 11: II. Recitativo: "Der Herr Jesus hob seine Hände auf"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad13836abe362ba64159ba933eb6f2d2cc4919f3936f5c37294cc0f25a3c043. 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/DEB111500513.
Lobet Gott In Seinen Reichen, BWV 11: III. Recitativo: "Ach, Jesu, ist dein Abschied schon so nah?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d370f2294765965baec8839e9e51f8e1220dd1f7ac13e8ea70a83532c7f5c7. 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/DEB111500514.
Lobet Gott In Seinen Reichen, BWV 11: VI. Choral: "Nun lieget alles unter dir"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4d14a4d2b1990d8699baa33c62c782b580b1ac2b0a97d7e6fc8b383e48e748. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111500517.
Lobet Gott In Seinen Reichen, BWV 11: VII. Recitativo: "Und da sie ihm nachsahen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c454453ecc54d0fee2e2cdc565d8cbd92b6454efc8f644df71688e9242d645. 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/DEB111500518.
Lobet Gott In Seinen Reichen, BWV 11: VIII. Recitativo: "Ach ja! so komme bald zurück"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8adb5e7bbfab613857512e1265bcbbb3b51db47e30969a2df7587d7abea247. 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/DEB111500519.
Lobet Gott In Seinen Reichen, BWV 11: IX. Recitativo: "Sie aber beteten ihn an"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94474d1640c821dc4959a80321b9db2fdf085658a6fe5c69e361f10b3a4a20d9. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEB111500520.
Lobet Gott In Seinen Reichen, BWV 11: X. Arie: "Jesu, deine Gnadenblicke"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca6ee420a46a6eedce03a590c4a5d618b84315d8f3af2f112c01785a8c65c51. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEB111500521.
Lobet Gott In Seinen Reichen, BWV 11: XI. Choral: "Wann soll es doch geschehen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8d1bc6997119b6e4233c3e34a8698305fad160e162ae72de248fc911c68641. 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/DEB111500522.
Bach, J.S.: Mass in G Minor, BWV 235; Eine feste Burg ist unser Gott, BWV 80
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556b3e94d4e174b687ddad24dcb1f52ded724c5d8aecbc447d097eeb446d28a9. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEB111711501.
St. Matthew Passion, BWV 244, Pt. 1: No. 5. Du lieber Heiland du
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cb635ced0cb17e05c8909cc7f978cabec255247490851f4e18b742ddca162d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBMY51903705.
St. Matthew Passion, BWV 244, Pt. 1: No. 6. Buß und Reu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1df401e7432f9258a85efa67319c664be70dd47f788eae0c48475dc56ff18c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBMY51903706.
St. Matthew Passion, BWV 244, Pt. 1: No. 27. So ist mein Jesus nun gefangen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf003f88d0cda3a39a8328889c0df0835818f966d62b86acf380996d350e596. 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/GBMY51903727.
St. Matthew Passion, BWV 244, Pt. 2: No. 30, Ach, nun ist mein Jesus hin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b92364aeac7d4c1efef41e375063fd0c843241310276646f62d1abcd1657fe8. 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/GBMY51903730.
St. Matthew Passion, BWV 244, Pt. 2: No. 39. Erbarme dich. mein Gott
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1423a4eaa1e28d1a5e22241962e4ef0e5bb6f02dd2b0c8d38e30ea8d6d5bdb. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBMY51903739.
Brockes-Passion, HWV 48: Arioso "Erwachet Doch!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb7b8633c0a5e22f05b223bdc559387ceadff0d40dc75f9d744f8ecade8cc12. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/FR50X1964420.