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 0x5de972f79bb767802ec0d9084d4920afd493e4a8eefde3ebc6da82ee0654e8c3. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0127455-57af-4477-af03-8d390aaa1702.json and https://artists.proofprofile.net/proofs/artist/e0127455-57af-4477-af03-8d390aaa1702.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0xaab7aa0bf17453b031865743b4d02f2b91123fb6ea275ae70f777c843c6e08b7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9212200051 — a six-check JSON result.
Choral aus BWV 26: «Ach wie flüchtig, ach wie nichtig» - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25ac4c11e5f36eb9df3b81762662034ce7757dd3ffde77df1163e115f9581e5. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9212200052 — a six-check JSON result.
BWV 1003: Andante für Violine Solo - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04852f37b7cb2b3577a1a29fc3af54bdbfe394eef5f85ec8692c22e7ddf359b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9212200053 — a six-check JSON result.
Arie für Bass aus BWV 166: «Wo gehest du hin» - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcc689548032581737884998bff055fbd7ecd0a988ee4098deacc03faf309fe. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9212200055 — a six-check JSON result.
Eingangschor aus BWV 26: «Ach wie flüchtig, ach wie nichtig» - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da820007b09bdcb5a6e048c383970ada9d519e589fd962267548851c81f861b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9212200058 — a six-check JSON result.
I. Orchestersuite BWV 1066: Forlane - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6c13c39647aa525a5fe56e56ef74d84b2313dbc814dc3b1b6f6a94cef924e4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9212200060 — a six-check JSON result.
Choral für Tenor aus BWV 140: «Zion hört die Wächter singen» - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d7657ecc1245bdd7e888060225ac624f0ffd2884cf5be9319747ad81e25f34. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9212200068 — a six-check JSON result.
Schlusschoral aus der Johannespassion BWV 245: «Ach, Herr, laß dein lieb Engelein» - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7174c5e3c23bdc8965fbad9d72112562e10bb5848d27f4a1347b0cb9889bd386. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9212200070 — a six-check JSON result.
BWV 31: «So fahr ich hin zu Jesu Christ» Schlusschoral - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b348a8f653a69ad47b5324d6ac744db1dd251b2b2e6af249deadfae74c172e7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9212200072 — a six-check JSON result.
Geistliche Chormusik, Op. 11: No. 26, Sehet an den Feigenbaum, SWV 394
Heinrich Schütz: Geistliche Chor-Music 1648 (Complete Recording Vol. 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47636ec83afb381112e0612fd76c5d5390dc829ac3c7736c190f3659767f83d. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB110702208 — a six-check JSON result.
Schütz: Matthäus-Passion (Complete Recording Vol. 11)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb911e0b2b57b57afdf8be4cbd91d3bfc8066354c357e2e1dab527675e10b03bc. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111500101 — a six-check JSON result.
Geistliche Chormusik, Op. 11: No. 13, O lieber Herre Gott, wecke uns auf, SWV 381
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712e5fa28915c7cffde1f5422c5ad36c679ae24e98eaf60248140119f979adf4. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB110702113 — a six-check JSON result.
Geistliche Chormusik, Op. 11: No. 20, Das ist je gewißlich wahr, SWV 388
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x175045985c7eb98050ac72de8708726f4f2cf2da79c186b83132cc4ce1a15a3c. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB110702202 — a six-check JSON result.
Geistliche Chormusik, Op. 11: No. 23, Selig sind die Toten, SWV 391
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73a28b6e259f1d2b0fb093034f0af13ca37f491a75ed8e45f8e68c8a6997b2b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB110702205 — a six-check JSON result.
Kantate zum Triniatisfest, BWV 129 "Gelobet sei der Herr, mein Gott": III. Arie. "Gelobet sei der Herr, mein Gott, mein Trost" (Sopran)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x772d38e019c36d839289f5a0abb649f8decc6e5d1673d6e0407324248fb93d1f. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH9211100018 — a six-check JSON result.