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 0x8d0f3d1bf42070d9c74f41f728d4d167e272f7462174a386759a2ca82c9c9bd2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd5b7c12-5824-4aca-be90-343185c5a4d1.json and https://artists.proofprofile.net/proofs/artist/dd5b7c12-5824-4aca-be90-343185c5a4d1.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 0xc65843ad8504f2239c91b5090ce014f7b11f01173e550137df8aec2201b86033. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HRA041684781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc3116cbe77f6a7621a7cb7d9393551c0f1bfe281a46389f9a193604495d59f. 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/HRA040639747.
40 Velikih Hitova: Ljubav Postoji Zbog Nas - Najljepši Dueti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23639bba7745406309a84f5d10b233a67f3d6903b95fc78c298896970cc3cf61. 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/HRA049836511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed77a253cd4c36757155a1aa0d8d9eb08f6981df9e7d0113e579a8190458a906. 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/HRA040243568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a032cf9d1ddeb63107fc7df130986fd43acf8b3ac0862ed207d932b2570349. 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/HRA041582081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf4112343a74ca46da5c48b741ba77fd6c0fa39ad6c11a6283f5bc8e8e23484. 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/HRA041582137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c2627489aff0cc1f92ec7244469b207f50d839c41995e2104a5f252daf69bc. 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/HRA231500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf789a7b9ad541e4d7a1cc5a75f540a452633d19e50a065b1f81890a24e0335. 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/HRA231500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77fe00bcd60c8aa120603399a75d95880a69662dfad614007ad9b04ad5abf35. 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/HRA049022067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f64bf8167abbadb572aad36fe2e886ccb8132f6d97eea02e052bacfc0a03bc. 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/HRA041370963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9412c2c977148a6029408a27c699c719b55ac3b2069614ada0828a46a2e23a. 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/HRA049430675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6973cda993099762bf93f53fe44855de672192bc75ce0448c22e53f470ad002f. 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/HRA041582885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc847f7ee456fe50cec6f16969bac135b62d0327f46fca20d43bc5e68b03bdb. 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/HRA041788111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04df2e84deb26c17150a4ceb13359194746da8c7e1a1b7958060bbbc28d62a3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HRA040647985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ec782b3f893d9da1b7892b41fa3d63f5b0e814dbeaea7407dacee39ef9b717f. 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/HRA040644743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f81c8a51a96b6c881598edd174bb785d96ca091b8b6e3b1612bffb541522d13. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HRA040644707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c9235cd46011f0fa69e3108e5bd266b757f3b64e5c1070802129dcb0701369. 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/HRA040643692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709f350c14bce0337315ce025a006bfd0c0432d531d721bf87cb59967d6505f5. 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/HRA040632350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4dbe14c3714eef60815731d73b25e7452a3ae616b0a33d2eb63445a16376be. 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/HRA040642868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709f350c14bce0337315ce025a006bfd0c0432d531d721bf87cb59967d6505f5. 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/HRA040632350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642f6bb0f6c5bf072d81cf3cc95389593d75b37a12c81aeebf157eb3ce1d5673. 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/HRA040638290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709f350c14bce0337315ce025a006bfd0c0432d531d721bf87cb59967d6505f5. 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/HRA040632350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a60ff015e92a701e9c1a7fc9a00aa03d5630279ffd5a3e5e8777fa5c6bc3f3. 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/HRA040632098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa35b97822b9facc02824274e6711fecb0fb95f622f67831c29eadaaa66759b. 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/HRA040631842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d45ccddc704263b52867c339ebbbd2eb056435b3d5e984cc730d69756ffd207. 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/HRA040630677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9412c2c977148a6029408a27c699c719b55ac3b2069614ada0828a46a2e23a. 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/HRA049430675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a45f180f862557d7be613ac3df68b47f3b887ce752f0876487c0cfee1eb7bd. 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/HRA040632100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbf49ad6ef32b72f3318dee52cb6aa63b4138411b2fd5ea5b98b238814a2182. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:52:12Z), 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/HRA040633347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9412c2c977148a6029408a27c699c719b55ac3b2069614ada0828a46a2e23a. 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/HRA049430675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e0b4ded6b47af30a88e77daadba53c76096151d5ed6735da4285d1a812f175. 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/HRA102109553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235891cd870061768178469bffd54420388b1a0507a40580240b9282bdc4a79a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HRA102109554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac576b19ba07f234a3e6becb74bcfa421d1f65f328a2543313a66fabbf946571. 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/HRA102109556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477a2580a285ccb9e29a96a45df3155e7e3566970d3616f369cd6402e4138610. 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/HRA102109559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916055acd63211cc9628a84ae28ea2e1704f4645fe2b26c70960c0737e5eb8c2. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:04:50Z), 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/HRA102109563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb009d83a280076da7436f633de8cfb4be202916628376f68bb3fc5a983b6c3f9. 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/HRA102109567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abf162aa822a42dadf1645bc5adafcff89cb068344a6de431934a785d5a6716. 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/HRA049531901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6b3d1ae267cb6c2dc45dcab024c8ffdc7dab306c6b378b809f5383d53a3057e. 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/HRA049531845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c585f86dad78cc5c3e1089498d50e7aaa54d7d651fcacbff32d1dc1b900bab. 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/HRA040634734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9412c2c977148a6029408a27c699c719b55ac3b2069614ada0828a46a2e23a. 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/HRA049430675.
4. Hrvatski Radijski Festival, Pop & Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cfca2a03e60b8fb6f3d8aa65a43bd669ae282be287abc3bdec27681b0f1def. 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/HRA040641188.