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 0x4a0203915b9900d3963295a832f3f99e887bdd0fb4e67e3be4d6394b8cf318f1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e66ae1d3-0883-4a82-bf0c-e1f67cd95bec.json and https://artists.proofprofile.net/proofs/artist/e66ae1d3-0883-4a82-bf0c-e1f67cd95bec.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 0xabfc8ba069d328c16283d00b497130883cb82bfdb6841a17e4489e7020f2de6a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/PLA551500009.
Victoria 1920 (feat. Szymon Nidzworski & Wojciech Buliński)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6d0cb50ddc0f85689d4f9d87fcdad73be3bf18aef55b7370ef15161567fb3d. 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/PLA552000500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7306f050508b3acd5139a89cc737a9d099c0e7edde57250057f65e607b992d8c. 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/PLA552000501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a3f2ca9a56e76343cf35df665711c6dc84f44d70f8417973dac5207dad3829. 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/PLA552000502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465249c625738d933e3d167604295f72477ded94aae8960685319ede05154bc6. 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/PLA552000503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10ce45bc466c8a2f4c22aef3ea9fe0f08f2c7db8441a0607b3804e542786b9f. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/PLA552000505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x060366f5296d950ecb043b66f78360cbffd63aa480239ad99787e75654b7bc25. 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/PLA552000506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f81acc101247a3c3ffddb84594232cc686a156b4fe4119cd6bada71dd9c06b. 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/PLA552000507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27976f4e272916581faefd5f4d6550a8bc4eca24993210796f5f2619329cf102. 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/PLA552000508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8e96f744506aea649e0507d7428e7152286c2b75b46021bbd4e0f9b12b9c1f. 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/PLA552000509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6788745f0711569e68b8627f856d10037fd34f8576f8a8b81412dd4ed9edab5e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/PLA552000510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe478a56449e59380d44c31a5c3a1b804e4c0bcf64be1ce906967c0aefebeb6b3. 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/PLA552000511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdd8223cf70169fd7d58a2865b4d72ff5426d33179ca15a8104d249a91b8202. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:11:08Z), 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/PLA552000504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65ec0c6d284e111d21a70b4427552c7046529d2d2b468b147f8ad17a66317a2. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:42:03Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA552200155.
Keyboard Concerto No. 5 in F Minor, BWV 1056: II. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50ab98ac5b95a0b7ec74dce526033b705d7ba28d524e4c5731f6b60e0edf26f. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:10Z), 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/PLA552200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867a1f76e44be025d8e305b91c8bfec98573e04366205d335737256ab4b724a1. 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/GBAYC2302326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa88f530fcc7705531124000a97c6efadbe5171f4ae6ff5205e66be45d2f608. 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/GBAYC2302328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1969ee601e5f674be485f8ce847f74b6e4a40d1683fdc0b2392d799beb7f92b0. 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/GBAYC2302329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13183adb8f548871d60a823e19e446a78a69516576d752050555a5e816401ea4. 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/GBAYC2302330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cafe215219c83a2299d37b587fe05c861bd1f0972d4678021e75f772eed561. 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/GBAYC2302331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cd768837caaeb49dcfc11eecf1ded5d7246a86071f44cad0f653a8cda4575e. 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/GBAYC2302332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ecd0b18068790d18f280429ee6db6fe8798ec47c524eb5e228c1dabb922c8ae. 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/GBAYC2302334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32ea239e96587c133f028a02d80ccd99fff9004b36147770c9d5ec2ab3e59f3. 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/GBAYC2302335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24aa4b76dc0d6c3b447cff24095a1a584885f6a6fc264243dfeeca11e73cc84a. 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/GBAYC2302336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8774d1095e227e5635fc3a0c090f4db180243979baa5d3248a4d6f505f160272. 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/PLA552300654.
Cantata, BMV 208: IX. Aria. Schafe können sicher weiden (Arr. for Cello & Piano)
Soft Classical Music for Studying and Reading
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0296f3a4c8c4cc34425d99ffb41e430e283cadba426ab2c6953e85e1c60a05. 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/PLA551700154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6788745f0711569e68b8627f856d10037fd34f8576f8a8b81412dd4ed9edab5e. 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/PLA552000510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfc8ba069d328c16283d00b497130883cb82bfdb6841a17e4489e7020f2de6a. 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/PLA551500009.