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 0x38af9a8433e19e01ee568038879123c063ca2d7a0248c0ecd8557eb324d9a2ba. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/317a1774-2018-484a-bbae-e2219a2939cb.json and https://artists.proofprofile.net/proofs/artist/317a1774-2018-484a-bbae-e2219a2939cb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
St. Matthew Passion, BWV 244, Pt. 2: No. 39, Aria. Erbarme dich (Alto)
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 0x0d131991e6193fbd174b4b918421a6c919b3fd79917971989edaed968b027d7f. 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/DEN960802070.
Gott ist unsre Zuversicht, BWV 197: III. Aria. Schläfert aller Sorgen Kummer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x032fb668eb79144c3b740cb0cf6b3fbd2bc3436afc25729d97372985ac9fa999. 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/DEN960802050.
Was Gott tut, das ist wohlgetan, BWV 99: V. Aria Duet. Wenn des Kreuzes Bitterkeiten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae92baf813fcf79af1322f4c2b3ccf6ac907b38781073759b027a95760d98a7. 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/DEN960802060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d131991e6193fbd174b4b918421a6c919b3fd79917971989edaed968b027d7f. 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/DEN960802070.
Geist und Seele wird verwirret, BWV 35: I. Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd154b99a4843e7bfec377af728860d3760a249e66b59872fabc5ff4fc904d9da. 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/DEN960802040.
Weinen, Klagen, Sorgen, Zagen Cantata, BWV 12: I. Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe207be46588fd8a2d8ad62d70fedf709d5413dac77c2774a527776033ae7c7. 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/DEN960802090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100c346c35a35f11780bc1c4221a455ccb6a78737da9c8062d54ab9b77f480e1. 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/DEN960802100.
O Ewigkeit, du Donnerwort, BWV 60: I. Duet. O Ewigkeit, du Donnerwort
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847f16e82fec5684d96d59dc83ca95f7011ebddb819bbbceb464c380d759bc8e. 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/DEN960802110.
Nun komm, der Heiden Heiland, BWV 61: V. Aria. Öffne dich, mein ganzes Herz (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd024531c315a3b96a17dd5c561a354e3c34399d1e5c90312e382852ac36a2dc5. 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/DEN960802120.
Widerstehe doch der Sünde, BWV 54: I. Aria. Widerstehe doch der Sünde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae54b37bf02c533434d71e12a8fee068e033c8c1f714b3d3a613454687199411. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEN960802020.
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
Freue dich, erlöste Schar, BWV 30: V. Aria. Kommt, ihr angefocht'nen Sünder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c78ad37a33be19861941558d315cb9e2c86f2c85aeec3fdc81efcaeb4d7fd0f. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DEN960802080.
Wer mich liebet, der wird mein Wort halten, BWV 74: VII. Aria. Nichts kann mich erretten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9581d1f9421f52fd9dce5d69389f203f259107305a5dff062151c80a768b032f. 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/DEN960802140.
Magnificat in D Major, BWV 243: VI. Duet. Et misericordia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9cd8209d42f514087c49953cd2dfb17d3202f9556e23a49f09c7fbdaa260a3. 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/DEN960802030.
Sei Lob und Ehr dem höchsten Gut, BWV 117: I. Sei Lob und Ehr dem höchsten Gut
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022f459d50a4d59e535b9a0b64c6b6091d13feaa039d3515244b83b7d1374486. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEN960802130.