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 0xb1fbd2c51d5988a84a77c58579dbf94840311e0c28994331dadf1824b9fc2a7c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e7a954b-011e-4046-bb80-9d06e20d8abc.json and https://artists.proofprofile.net/proofs/artist/4e7a954b-011e-4046-bb80-9d06e20d8abc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cantata, BWV 115 "Mache dich, mein Geist, bereit": Aria "Bete aber auch dabei"
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 0xbc9762ab7880176b66e66eb25a546dd7090983352a995100ddb80392512afbe5. 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/DEN961600830.
St. Matthew Passion, BWV 244 / Part Two: No. 51 "Gebt mir meinen Jesum wieder"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54454050c2b76b72c5c8bc20c1ce8a8fec25e7db8620f91ec10ab54baf901f28. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEN960900890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54454050c2b76b72c5c8bc20c1ce8a8fec25e7db8620f91ec10ab54baf901f28. 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/DEN960900890.
Liebster Jesu, mein Verlangen Cantata, BWV 32: III. Aria: Hier, in meines Vaters Stätte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc2b16f4856500f97d3e719d03ac8c8d8ba93e8bdb85b702f2f8aaef830c2ad2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEN960900900.
Mass in B minor, BWV 232 / Gloria: Laudamus te
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd6eb71f6b189f2a3da808cda2514fb6dd93a69b7943dc2ecaa2110c60aa7e80. 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/DEN960802790.
Ich lasse dich nicht, du segnest mich denn (Cantata BWV 157): Ja, ja ich halte meinen Jesum fest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67644df759e3bb88c70909996b9167a5d8e5233795faa0484662b57648710a71. 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/DEN960900910.
Cantata "Wer mich liebet, der wird mein Wort halten" BWV 59: IV. Aria: "Die Welt mit allen Königreichen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c391863d9022b2bb4859f689f3e8b9f56fb1f6280e60b85ce15c60497eecd11. 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/DEN960802800.
Wachet auf, ruft uns die Stimme Cantata, BWV 140: Arie (Duett): "Wann kommst du, mein Heil?"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b11af7a19eebc1bec8389b94b2b0e68daa418e7bf3dc4fe7329692235c9a22c. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEN960802760.
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
Cantata, BWV 204 "Ich bin vergnügt": Aria "Die Schätzbarkeit der weiten Erde"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a21fa5ac6123dfa532c3624d4653ee902bec949faf8e6fb9913cb48b1c672f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960802770.
Zerreißet, zersprenget, zertrümmert die Gruft Dramma per musica, BWV 205: IX. Aria Soprano: "Angenehmer Zephyrus"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827abb1a71912b270a41576d8cd03379d10a623639a8fd999b73bb0b7cadb8cc. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960802780.
Cantata, BWV 58 "Ach Gott, wie manches Herzeleid": Aria "Ich bin vergnügt in meinem Leiden" (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce660de95db6b88d705a91fc88e7a90af82fa507ac9c12f8d7428a2fb104c2d0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960802810.
Cantata, BWV117: VI. Wenn Trost und Hülf' ermangeln muß
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330245e4bddde593d8693db78659483298746dee788c2996e250ccc7f1831aab. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960802820.
Der Friede sei mit dir: Cantata, BWV 158: II. Aria & Choral: Welt, ade, ich bin dein müde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b9f3c34960071c06c4d1d3973bb154c542784b28b4178b369b50f31198f398. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN960802830.
St. Matthew Passion, BWV 244 / Part Two (Arr. Mendelssohn 1841): XXXIX. Aria (Alto): "Erbarme dich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04734054faf9fad30ffe0e43af0a772d417a577cc162df587ba981a2ae76753d. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/DEN960802840.
Cantata, BWV 197 "Gott ist unsere Zuversicht": Aria "Vergnügen und Lust" (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a5545bebe24555b0c2ecf6269c59a2135ed2e1d7a4a2c182c01309170d3c04. 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/DEN960802850.