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 0x309c78ab3a18347e09c414f176fae4c7d7cf1337e162b57264f7dc8f99600854. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f3ed03de-8a81-46a0-8d42-43570279e8cd.json and https://artists.proofprofile.net/proofs/artist/f3ed03de-8a81-46a0-8d42-43570279e8cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stabat Mater, Hob.XXa:1: I. Stabat Mater Dolorosa
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 0xb78a87b2f517e614aba1404d0803435f7b8878fde6415e65ff6eb1db4662686e. 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/DEB111716001.
Stabat Mater, Hob.XXa:1: VIII. Sancta mater istud agas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3ddd069510d90e3df1ea0effb7e0d096e8b1b61d5b03a99468b67aca8d675f. 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/DEB111716008.
Stabat Mater, Hob.XXa:1: XI. Flammis orci ne succendar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170687070245fd8e7b7e81317f1718c286a0e7de164902c6f77584b2ef948314. 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/DEB111716011.
Stabat Mater, Hob.XXa:1: VI. Vidit suum dulcem natum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946bfe2ba7a5a5557c41aa24d5c38a2f25174edd4321c75523c08d5d9ba6160a. 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/DEB111716006.
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
Stabat Mater, Hob.XXa:1: X. Virgo virginium praeclara
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3509c5ee99b837d9d22be1e8dff88f8a3b2bd9feb110aed77ddfe09c3113580. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEB111716010.
Stabat Mater, Hob.XXa:1: XIIIb. Paradisi gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012134d8488881bf68ab490f4677d9084496d51e7e61fedfef1d8aebf4631baa. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111716014.
Wolfgang Amadeus Mozart: Missa in C Minor, K. 427
Mass in C Minor, K. 427 "Grosse Messe": I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe265e403f16af55d57f67685bb7a9b5001be33e9e5e67a31e5ae9e69537cef. 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/DEB111609601.
Mass in C Minor, K. 427 "Grosse Messe": IIg. Gloria: Jesu Christe - Cum Sancto Spiritu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe64dbe9e014b787d0b8e98570b8350da62ee04a090947baef8ace7740d3c06. 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/DEB111609608.
Messe in B Minor, BWV 232: No. 4, Gloria in excelsis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370b04185e8d04d5e62888dd6ff8a28ce2940e2c6404ecc07fbd6dd95a4259be. 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/FRZ130837040.
Bach, JS: St John Passion, BWV 245, Pt. 1: No. 3, Choral. "O groβe Lieb'"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d445654e5cdc1a738f9d90b2220567729f4bd375354a87df491cb5fa5a23547. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GBAYC1602495.
Messe in B Minor, BWV 232: No. 3, Kyrie eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52680345ba9e9174cdf6c6dda219f5b19015d9991c25144777455e666e42a68b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRZ130837030.
Messe in B Minor, BWV 232: No. 7, Gratias agimus tibi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f107894e223519d9166464e64fee17cf3b23e5ff4415ebe5ec594ad80bf0a8b. 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/FRZ130837070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5797c29a0467c192e6546c18e093b64fdcbcc2900b07cb3474cec49e0844010b. 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/DEB200836701.
Bach, JS: St John Passion, BWV 245, Pt. 2: No. 39, Chor. "Ruht wohl, ihr heiligen Gebeine"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf0a175dbfd31fe3b003b4b4e5ae5055e532e7accd120b4785d14d8f606d518. 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/GBAYC1602538.
Messe in B Minor, BWV 232: No. 9, Qui tollis peccata mundi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49d12194f5d6c9be3daa7a7c1c74ad26515ae1ad1c9e03704f4d47345954b58. 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/FRZ130837090.
Bach, JS: St John Passion, BWV 245, Pt. 1: No. 5, Choral. "Dein Will gescheh, Herr Gott, zugleich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b4af2f5a3aea087ffabba9370742d026a0c02d6744c47d6fcdb9eea8a0296a. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC1602497.
Messe in B Minor, BWV 232: No. 17, Crucifixus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5213637fa6e7fedde73257c5757acb33059a88b67a804198845d5beab35aa2. 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/FRZ130837170.
Bach, JS: St John Passion, BWV 245, Pt. 1: No. 10, Rezitativ. "Derselbige Jünger war dem Hohenpriester bekannt"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cbb305c1d2dcef69d64820cacd818e225d9c8166b9715654a0d71ae92a913b. 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/GBAYC1602502.
Messe in B Minor, BWV 232: No. 1, Kyrie eleison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fe775f83375c182ee741e31d6f8302ae3f87a88875b0ae3998d9c7e8b89b080. 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/FRZ130837010.
Messe in B Minor, BWV 232: No. 5, Et in terra pax
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eb1429dcf2dd9669f49feb565cc1db303eeeae453a18c3f7fdaf1662012a5d7. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRZ130837050.
Messe in B Minor, BWV 232: No. 12, Cum Sancto Spiritu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f4d7fa92da1e0d6a3aa7546b9a8f19882195e3b6f7a9a71c9b128bccb7512b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FRZ130837120.
Bach, JS: St John Passion, BWV 245, Pt. 1: No. 2, Rezitativ und Chor. "Jesus ging mit seinen Jüngern" - Rezitativ und Chor. "Jesus antwortete"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08718608a978d44a5854c07b5d84596d29a5d999fa8b51aa1ff328a84a1b817b. 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/GBAYC1602494.
Messe in B Minor, BWV 232: No. 13, Credo in unum Deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4360caff824a9dc322eb7bcdbb83e3e974b2d8cbe376b7a295afacc867d91a34. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/FRZ130837130.
Messe in B Minor, BWV 232: No. 16, Et incarnatus est
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3138690ca8b0f0d05d8d831eaf3661db6381b25eb4294f60bb9c14d514fdd032. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRZ130837160.
Messe in B Minor, BWV 232: No. 18, Et resurrexit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c527c0c1258522dd3b530b363feb0fb27a31a4d3ba63acb1dfa9a944f16263. 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/FRZ130837180.
Bach, JS: St John Passion, BWV 245, Pt. 1: No. 11, Choral. "Wer hat dich so geschlagen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8a25c1aaf0bf9b27a58e7327ef9af3703881dc1702cc415b387e53f38605c5. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBAYC1602503.
Bach, JS: St John Passion, BWV 245, Pt. 1: No. 12, Rezitativ und Chor. "Und Hannas sandte ihn gebunden" - Rezitativ. "Er leugnete aber und sprach"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2713ed4e57c9e124a332fcf8749fc8f732ced1cde4915b8c6f32f7735407171. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GBAYC1602504.
Bach, JS: St John Passion, BWV 245, Pt. 1: No. 14, Choral. "Petrus, der nicht denkt zurück"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afcd49999e62d49abb3d7fce147678e9362fb9d3aa54c0aab65c82af1a3710a. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/GBAYC1602506.