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 0x8982c226487eeb241428d2ebf04855b640348363ee27e377bf1c0f31e30888c6. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f885a4f8-f2f4-49e9-ad47-44f9ac5c5598.json and https://artists.proofprofile.net/proofs/artist/f885a4f8-f2f4-49e9-ad47-44f9ac5c5598.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Far Far from Each Other (Lied Trios for Baritone, Viola or Horn and Piano)
Das Sühnopfer des neuen Bundes, Pt. 1: No. 1, Wo find' ich ihn, der meiner Augen Licht
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 0x65c8d1edad1b85867e0393cc5dbe93e886455543e7ab24abe5d1dc8f44c3901a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEU921909601.
Das Sühnopfer des neuen Bundes, Pt. 1: No. 4, Da das Judas sahe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134e744eddb8781664689f148062049e1f5e665f30dfe518db49ca5cf0650bb3. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-21T17:03:34Z), 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/DEU921909604.
Das Sühnopfer des neuen Bundes, Pt. 1: No. 5, Lasset Maria mit Frieden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75362ecf13465c37d5b241e56a9047d390e3004cc0e644f3626806eee1746b42. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEU921909605.
Das Sühnopfer des neuen Bundes, Pt. 1: No. 10, Mich hat herzlich verlanget
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef89f6c5db91bf8d7f9801e4e2d6851771c52574d88b673514a6fb3dfee6250. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEU921909610.
Das Sühnopfer des neuen Bundes, Pt. 1: No. 11, Da sie aber assen, nahm Jesus das Brot
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297f17e426747ce7710c8c802f4a351fd2eea966b2f92195438009e0d44fd8ba. 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/DEU921909611.
Das Sühnopfer des neuen Bundes, Pt. 2: No. 19, Weh mir, wohin soll ich entfliehn?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2c366cbbad9067545264c4b62752221223a1f0dad69911b98623843619729e. 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/DEU921909619.
Das Sühnopfer des neuen Bundes, Pt. 2: No. 21, Pilatus ging hinein in das Richthaus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974e87add63a49482545a831ae368b021318bb2963d81c1d5cdb7366cb6b66dd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:07:55Z), 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/DEU921909621.
St. Matthew Passion, BWV 244: Part II: Recitative: Und wiewohl viel falsche Zeugen herzutraten (Evangelist, Testis, Pontifex)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001be8e81f6d6b78c335b8f13da025ab9d12b43759178e7a4763388cce2b274f. 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/DELW71480042.
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
St. Matthew Passion, BWV 244: Part II: Recitative: Und der Hohepriester antwortete (Evangelist, Pontifex, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e3ffd1790de7ec6eec3866e34530bc4212179c23f1b45b397b5f7cf3c13d2e7. 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/DELW71480045.
Das Sühnopfer des neuen Bundes, Pt. 1: No. 8, Wie der Herr es uns geheißen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025b9969160312c6e2dae22ad0d16b4eeba28a0d63b3bb07502dc5b129291723. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEU921909608.
Das Sühnopfer des neuen Bundes, Pt. 2: No. 13, Auf, mit Schwertern, Speer und Stangen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x527df7c9e968012e21cef95627368c532a7c8e2d3041460819b1fb4316242ebf. 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/DEU921909613.
Das Sühnopfer des neuen Bundes, Pt. 2: No. 17, Und der Hohepriester stand auf
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a893892ee680b6ea5f4647ee5c7aa08ef7086e23745ee98e395fdbcbec9807. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/DEU921909617.
Das Sühnopfer des neuen Bundes, Pt. 2: No. 18, Ich beschwöre dich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89b43099c782fcfb547e1e41d354d785e92bc79069825630706e61d12c031d37. 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/DEU921909618.