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 0x3c2e4b1443cd94c383e6ba77aa37c2487312828c18f916ef09ffdc3fd213f06e. Chain 2 (Bitcoin): anchored in block 953641 (2026-06-14T13:54:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ce19fb3-5d21-4ae3-b7eb-e4cef7bfd218.json and https://artists.proofprofile.net/proofs/artist/3ce19fb3-5d21-4ae3-b7eb-e4cef7bfd218.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Dans i de saligas ängder ur Orpheo ed Euridice
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 0xbd59234011551bf2d9526cce951aefde123ec7f41f7673d0236b4072cb593ce3. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEY331000111 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40707c60ec76fdceb302a0898688080b2fc54ebbe6fb8d96ba44a2dd7bd81d15. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE2GF1800110 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f08242597ceff22ee4ee3e5dc69466a8b94a3e13b72fca7aa00ed4e3927e8c. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SE2GF1800118 — a six-check JSON result.
St. Matthew Passion, BWV 244: Part I: Recitative: Da das Jesus merkete, sprach er zu ihnen (Evangelist, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1da0f8fb82c1332edd31eb9ce98ed2d7477e348ee199524374f0d822501102. 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/DELW71480008 — a six-check JSON result.
St. Matthew Passion, BWV 244: Part I: Recitative: Er sprach (Evangelist) - Gehet hin di die Stadt (Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dae53f9c4ae5829c215d2e25e29fa1bb143d146a8e550362b912fab6b847f6. 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/DELW71480015 — a six-check JSON result.
St. Matthew Passion, BWV 244: Part I: Recitative: Er antwortete und sprach (Evangelist, Jesus, Judas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf28c3481d3ddc60c9ad596b97f2622f4a9520ec08221ed4da5e3cc871cb675. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/DELW71480019 — a six-check JSON result.
St. Matthew Passion, BWV 244: Part I: Recitative: Und da sie den Lobgesang gesprochen hatten (Evangelist, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d28871982d870b213de612f68f8ba7f72243cb514343c3f580cfca7c828bd4e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71480022 — a six-check JSON result.
St. Matthew Passion, BWV 244: Part I: Recitative: Und ging hin ein wenig (Evangelist, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c29777c1f839e8861be973bf5a22bca72e97601984736e446767be24e550974. 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/DELW71480029 — a six-check JSON result.
St. Matthew Passion, BWV 244: Part I: Recitative: Und er kam zu seinen Jungern (Evangelist, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2510e68231bbdbe0813afda8774ad9764b35e242c4cd734992022d74b329dfd7. 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/DELW71480032 — a six-check JSON result.
St. Matthew Passion, BWV 244: Part I: Recitative: Und siehe, einer aus denen (Evangelist, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1c578560a6d71642944e3c78bdfb4b44ec6b3428ec0d41f18a3599cbdf5707. 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/DELW71480037 — a six-check JSON result.
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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DELW71480045 — a six-check JSON result.
St. Matthew Passion, BWV 244: Part I: No. 2. Recitative: Da Jesus diese Rede vollendet hatte (Evangelist, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a49f2b9b304ec1e134734f533a9ab8ad3dbb354cb160a5f73b0d1c10a8c78bd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62171636 — a six-check JSON result.
St. Matthew Passion, BWV 244: Part I: No. 4. Recitative and Chorus: Da versammleten sich die Hohenpriester (Evangelist, Chorus, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3de3f1dba0baeb3c7bed858d9a0509f6c5113918e5ec9112c1f167e9360a09ce. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA62171638 — a six-check JSON result.