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 0xc059767da742867be140278cc7e56a9d308be7d0976ce13ab67e57968b52e1d8. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9253b72a-1022-4486-92c5-345265766ff4.json and https://artists.proofprofile.net/proofs/artist/9253b72a-1022-4486-92c5-345265766ff4.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 0xbfbaa176f41b5a26feb3bef5bc91ab2c60b00d8d11097c5c83cdf94a2017eb40. 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/HRA047883305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bc92d40a91d36c76cf1128d9f443913fa8243ba8507837bc9773883db5fe4b. 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/HRA040040447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74aefe18a210f7e7e549e6e2868caf1f80e4bfdf8ab1d7d15436580eac6ad3c6. 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/HRA040642319.
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 0x451b9df42cdb3095fab76326fef78cba4f74a0324583691f9e624a0f6b3edea6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/HRA046412920.
Ix Festival Zabavnih Melodija Zagreb 63-Ploča 3.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a13c2ac7b148ac05f195afc51c3d9dfeff749489015bae8d76e62bd338fef41. 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/HRA046310564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02df7bed34ebd27f7610974ea9f7bc53471413adbde194d0d6e4041b24ddccf8. 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/HRA046338826.
Festival Zabavnih Melodija Zagreb 62-1.Ploča
Mozaik Knjiga - Radi Se Jih Spominjamo (Box)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f595ff0d5b1174241a3cc5436c1d1877e2cfb2efb6e6530ea6115edbe6a1e77. 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/HRA046707415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89684eb610f016ce14742a534a39f6bad6774b4158ef1d8b7cd9566a5a89ca2d. 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/HRA040960161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9364ecbfb7cc606ff02d7c670ea8253460cf64b65d9b91f393e9a2fbad5355c4. 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/HRA042199979.
8. Festival Zabavne Muzike Melodije Jadrana Split 68
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96636d565286c1f663c67e51024c0e20f6080bacdb80738131ce239c7350e7e. 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/HRA046854440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bb7da19759b5fe8fb23b4d1fad63550dbe5423f7949a3d514f5e60f4dd7685. 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/HRA045945082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778f974b707b9b8aba377b58d940b6a80136476611e195d723ae3c83c2ee5e14. 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/HRA046343801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5348e4e7e9fa15dca3cc2bd0ede1d821a2cdef027ed985374e5cacdce013b5. 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/HRA046443802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe12237079079336a25f46b8e6a39807ace39784932370709d30e3c453075873. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/HRA046177085.
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 0x27e84515e3b6f301ea842ecab72488680a5ce91d64639c63084a44fe89c34d37. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/HRA046177086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ec4ccba62fcee8e3c73569aae29b248d3160fbfb8d4178e303f3d05e144e07. 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/HRA040643790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22dfb365d14077199d174eed67ae742b4c08b68940c18d35b49a242315c86115. 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/HRA040643791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1c1532550c877178ce128c7203c1a45e80369e03e634578d40e5a2bd4b0984. 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/HRA040643802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f10d573ab0b61640fd20546caa12c24ff0197f1faae0596b84d5d1a5734930a. 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/HRA046043792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7402ebc84d20851154224102ca91a7de023b88ed96202aa01e657f2844e8537f. 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/HRA040643803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87375a1c252befa12ecec24d4cffccd11314c5208ceec56f1e923fe02bcef1f7. 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/HRA040643804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda76fbd0909ab8e0bfca6ede8b59506a28ecf1bef0cde4d58dbdfe6b60c2adcf. 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/HRA040643805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0d7955cc67d95d8dd9ea252daeafe4d34b3ded3a118ca591d3b0b7d5fc442c. 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/HRA040643808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bfdffd514c976f23b5e280fd596fd636657a2774761b3b983a15868d91f37b. 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/HRA040643797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a8e5211e9c8f34ca0e5ab25f9702948a5f866aff28368fe489903621f49f3e. 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/HRA046384286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855d77035f4cf37e5704caad2d1c36c4e8b47dd9cc8931a87eaac8252cb2004b. 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/HRA046384293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27addd910d87ad956b1fe48811764d8e7504b6caa71db7fbcbedf92481abbbee. 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/HRA046316770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd958d3b16d0266b0526963c0ccd0874a0ed5b927a98f218ff12d56743829d7f9. 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/HRA047010711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1aa0271106355148687d538f994953f8a5948330c9f5e028adc118201952f2e. 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/SIC030900593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a41e54bccc3486dfc0c1533c910b3cc9941b2abaee298f1c0f1b194171238c. 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/SIC030900596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7418b28b0b0ef03e6a8a5a5862cbd9a9088e0d36dde7113571c38b51fafc13. 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/SIA631201134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a40a6564c6e3c6e71acfb3aa015a8271de10151c16451fa6dfe73ebe707a0b. 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/SIC030900603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146288a85ee1a11f224fb042182580bc7e5ef4185d1ce44b790afe10573e651e. 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/SIC030900607.
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 0x09bd7d10dc8e82634bf18e1621fd6553d2fbca42288d56880fb900e32ac6cd40. 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/HRA047686839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5bf661753e3cfd13633525a9bf723e3acc6efa818f4c3ff5cdc798a6e1a554. 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/HRA040711068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f76bc0c33dd1f578e6185933167e04e4170cbb8224237e34e75a6cd0406382f. 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/HRA047883298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459de2ba83e048b117c4dd85a87664c47419b55ac981493530ca30b0c123118a. 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/HRA040648746.
Kronologija, 100 Izvornih Snimaka (Set B)
X Festival Zabavnih Melodija Zagreb 64- 1. Ploča