right|thumb|200px|Gniezno Cathedral Mikołaj Zieleński (or Zelenscius; ) was a Polish composer, organist, and Kapellmeister to the primate Baranowski, Archbishop of Gniezno. Life Neither the date of h
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 0x4d38448f9d0e749993f84e90251f8681dba11b3c765be8d63441cd9f6d196f21. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e0df5621-1df9-4802-b145-27adc23bc02f.json and https://artists.proofprofile.net/proofs/artist/e0df5621-1df9-4802-b145-27adc23bc02f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x5a6964d4f497ce494db53311856afd5040adfb1cd03931e72b8436d1194f9d4b. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE472000022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c839f3d58c5383d7be5e2c456857afcb114867eb7ac7c8a61f4b7d5b477ae9. 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/DEE472000029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f522987a85608b36f6e942069ec5acf4520550fefd53b7c5f1ed3d74785adc. 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/DEE472000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x764ab4b27de81413ce3dcc7464df595b83566cb914f84efbac2ea4302e92c6ea. 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/DEE472000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f46868f0e2d4af44d52e270d78cf6e3b74eb6fb6bb6b4287630c739b3a35307. 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/DEE472000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6225689537c022bce530aad55192b03723a1b4f15eb2637b7db20e2dbfa04569. 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/DEE472000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a5b8c57f1cbd01512e2ed5eb46bda9acf8d091d1efdd98c4e32316a1b5e710. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE472000021.
Missa Tempore Paschali: Agnus Dei à 6 & 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827263ca4b7f319343ce4579503ef842d086e37fa0dcaa00bd9acb6fc819fb60. 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/DEE472000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bb7675746698a649b2401a6abacce96a3535a40da49a50e6be16e0cf45db91. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEE472000019.
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
Slavic Holiday: Legends from Ancient Bohemia & Poland
Trombone Grande: Music for Bass Sackbut around 1600
Zieleński: Offertoria et communiones totius anni (Excerpts)
Zieleński: Offertoria et Communiones Totius Anni
Zielenski: Opera Omnia, Vol. 6 - Communiones totius anni
Zielenski: Opera Omnia, Vol. 3 - Offertoria totius anni
Zielenski: Opera Omnia, Vol. 2 - Offertoria Totius Anni
Zielenski: Opera Omnia, Vol. 1 - Offertoria Totius Anni
Zielenski: Offertoria totius anni / Communiones totius anni
Pater Noster: A Choral Reflection on the Lord's Prayer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4858d1971f52df66ad414586da13d4afd85d933c9a3c2a9ccef973a69e27c9a. 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/HKI191245401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x608251c1396f7ca3a0b1901b765169838e64ece7d62e2758fbfd3ea666137a05. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/HKI191245403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd3e086bafe40630d3b4d6704851b10025bd387c90932461cd886eda4857b7ef. 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/HKI191245404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a53c69c95cfb096d4c7465882d7df41c7c32fa8d56a534eaa26715d266d1c2. 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/HKI191245405.
Masses, Book 2: Missa Papae Marcelli: Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe3c2e94a0e5e98243a1aaa55231fb9c90067e17b124c9773c7ab3898e44a14. 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/HKI191245406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c7943f89633ed5ac6c79ca470a146986a9f2f8bcef35ab24a9a08a8c359c94. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKI191245407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab343bc43e12c1c6574c81fe655e8c8510027bddf49d613ffe3bbb8782964392. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKI191245408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c7d92eda49beb84f4bfe4de1e5d2f52fca249a4b6e3fd43ef9b87cb34a3c4c. 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/HKI191245409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf27b5d4faa919668e0bd1103c0576eeb7af7cfb6fef86555a2cf57aa44a6da4. 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/HKI191245410.
4 Petites prieres de Saint Francois d'Assise, FP 142: No. 1. Salut, Dame Sainte (Modere, mais sans lenteur)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03439d0cb78a8a14b4a8de6021cae6f958a24fc9a8a35d1652b1617d65f10b86. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKI191245411.
4 Petites prieres de Saint Francois d'Assise, FP 142: No. 2. Tout Puissant, tres saint (Majestueux et eclatant)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec525440b2c6a1a34f1e237f0fe85216ae7109ecf704be6f76526579f00af30. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKI191245412.
4 Petites prieres de Saint Francois d'Assise, FP 142: No. 3. Seigneur, je vous en prie (Tres expressif et fervent)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94f15efd0b3cce9a3470d04f451d41840f11ac6b4144c6a7f680c6a726a517c. 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/HKI191245413.
4 Petites prieres de Saint Francois d'Assise, FP 142: No. 4. O mes tres chers freres (Bien calme)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10addb29b116e36fab09616dad69ede4ad678515c712825a4dd53a3d950baf47. 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/HKI191245414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba7be1d85c74328ccfd633c757100a3932e39947d445585f77662aa43aa8810. 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/HKI191245415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdc7821d58f741228fa2f516f7cd4a1ac361f02793d517ad86021cfc90ca2415. 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/HKI191245416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6fe2f840865d7605806d3c80a02c0715f9bd4be17323fa9eced171dfa31967. 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/HKI191245417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bea8e39c179a4816f6edb535c372332108f5a1b1ee56d77437604adecd680cf. 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/HKI191245418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5503bdc2a149617a664cba650a753af483a56b90a67f5fb1ff6f4399ab5652f6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HKI191245419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3242b483c212684c453859086077bdce10f927818eae055c7ae484f17fa9107e. 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/HKI191245420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382256d767f5467f7762f2b1a8878b34a5e11323efeec945d75b8398eefeb2e7. 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/HKI191245421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4700e295e85919305429a7911d5b0f1ec2e389a972a9bd9784ae9359c50d01d. 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/HKI191245422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1e11ba226799e7fb72ceeb56e1121c9adef5e9ef475165edd4e75c0389347b. 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/HKI191245423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24dcb355176ab91ca259ac814b57a9c497d5654a723a6b3e8c80184b4ee5bc6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKI191245424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe87f5a9f06112394661312929f61c0eb50555bf5fc0880ceea3e0646d55c515b. 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/HKI191245425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a10299ecc9ffebde9262829d4958c678e10935cb00a501aa8abc864b316b9df. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRX211009062.
Benedictine Monks' Choir Of Santo Domingo De Silos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c2b4b4b1ee2384862e8e0593f4813c558d035b8fddfaf6f73319845667c8fb. 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/FRX211009066.
La Maîtrise de Saint Marc - LES CHORISTES
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01060db942dd0886a3144d7637e6be9bd23470a9c694a57c243991fb4830c7fc. 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/FRX211009071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955e4ab03bf09f199159736be638e504f53c68c4997a9aed0edc4b6ba62af2c1. 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/FRX211009073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x378624df1ce3e74dfaf47f6c06192c4b572785ffa15285be8b8ea54b28687c61. 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/FRX211009074.
Fire of the Soul: Choral Virtuosity in 17th-Century Russia & Poland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa595751b4b6ce2849a4688ffae9f786a107d12c5bcf2d4be05dd9b99bf887b29. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USTC10764723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a57c381a8a406f61e6b754e74c7fcfdc3791d5c8755c1cbb2a85720d6151859. 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/USTC10762462.
Les plus belles chorales d'enfants : Chants de joie
Polish Baroque: Pękiel and His Contemporaries
Chants des Renaissances italienne et polonaise
32ª Rassegna Internazionale di Cappelle Musicali - Loreto (Live)
Chór Kameralny Uniwersytetu im. Adama Mickiewicza
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b97c96b0f936c687323aec57e1fa548926ea9608b5228176873a89962cce2ee. 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/PL68T2200035.