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 0xfc6e159b7890658bcfa077338b4d788e61ee5f82f5d3b857989fe3440a565575. Chain 2 (Bitcoin): anchored in block 954014 (2026-06-16T22:46:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29c67137-459b-43c3-add8-1b9ce3729bb2.json and https://artists.proofprofile.net/proofs/artist/29c67137-459b-43c3-add8-1b9ce3729bb2.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 0x99f9f185de1071a2c2586fc333eeac528ba7bc18b42d4594fcc0c454da2329c5. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/HRA261017101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd36c275258c3511b9bffe873cd8bff32da67cfbe1d60c30b291db7cdcf5efd0d. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/HRA261219401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf593d01b3aad7f6e78c7862d413ba53e6a3caffead6c47924755206f0674762. 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/HRA261280301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8686ae1921adee4fdc36f7cc540818aafa28a5ceeb6b573e3751aeab8f33c116. 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/HRA260913703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c33e77020bebcbf9e2998595118d318497904ba97a5ae593c917793659700b6. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/HRA261322402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8bdab3999e639e99cbbd470828866fb74374a32d3d4d7553b20e9c4022d3e78. 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/HRA261220101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8018e49f42b46305aac048ed94dfba39875a236804362d6ee4d097747793165. 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/HRA261321403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4b9869a53c652905e4fdf9860eb93afcb270131bd3d7fe4ec9d708e61df76e. 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/HRA261219904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7470f7f80f69bdfbd8ac9ff8d0a1ac59c1fda903a7f930092e3c32e6f1ff2e. 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/HRA261220603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f346ec6e8f915b580e5cfda127b18848b1b8180f51449fea9199e56efb11d7f. 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/HRA261016102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb8da6c03750b30779ed1940553bee85f6769e5c81de95c3a86e978623bd38b. 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/HRA261016601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c15fdf8c2839aae55b829cc4061fe27923c6ae1afa8cfc8b4aaf8320a59c463. 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/HRA261380301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a42e0b1abb81460589ed2229a32f6bc525e4fb0e3f588dd2ef7152358b6270a. 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/HRA260608613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6344b8295600d7003080f179e771b1596763f3f2a401f15d1c4a6976f18bc1. 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/HRA260812816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cd25052e851cb56485c6220ae0028c732fe65180f00efbf58a2d94aa03b33c. 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/HRA260913807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bfa02139e3c365beaffae578d6a8b8e3056dace2815e5fdff58027549cf9b0. 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/HRA260813214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c86fd3e5c16ae8687c7fa78e7e68723998352612b1ef33821a5c8311ee6e11d. 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/HRA260914001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4cdd77bc54164cfcc3a59eb748856e13aa217be79c1d424f3bd62fce2eda596. 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/HRA261322404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbed1124881e92ea77a61d52c76d7eb2fb9c3128dd8078b626ab59bad41d091a. 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/HRA261220602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c055b3f8ca55cb89a8fc7e462b42eff24342dfc891d434f80fda4b6a2d2ee67. 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/HRA261380501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa061ddfb4a36a045d48aef52b1c0c0eaa29755dec7a77c0067717154e18a174. 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/HRA260710430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6398dabe9afc266ab46ab3d1054949ad232b2127c567faf5e47b2fafe372bf. 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/HRA260914214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904f6aaf85a5c9af15060c7853664785f2b8ab8786930ea4906005feaf57a66e. 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/HRA260914217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67956272837e5cece94cd0b0dc82daa6b3352b04496cd12838d363c271e75d58. 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/HRA260812807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8352a51410f6081dd9c2e0cb6905066d5b9a7854bc6375850a042e2d097cc4. 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/HRA261322201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51a490d36c6cb15192161f9f0a52c13ca323200f66ba7ecaae44987bb024c77. 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/HRA260812707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d496f5c2774544d224101c25fbe161987fccb4331c865c7c87a8f106af5161. 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/HRA260812705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd77c8553d67ceeaba91bd7fcfd645fcf1822e2ea78e0dc6bfc562ea2b6165b. 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/HRA260403402.
Festival Klapa I Mandolina (Opatija 2009)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02562d332a0f908fd6c49742b823ebe37709dc0281d32a2984c16775e9feb8e. 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/HRA111022515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314fb468255f6ce3665cbd7bdc608801d860146aa27ae5fe6f1bdbb29e14ed17. 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/HRA111022520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5afff7bc19271a110cf61958456a03d659721e9c9af1f44f7f960b3f673ee5. 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/HRA260812701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbdfaf8582efc5f140438cda1d98b2ff4ccd49a16a528aa188a750e5d7abbfc. 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/HRA260812706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51a490d36c6cb15192161f9f0a52c13ca323200f66ba7ecaae44987bb024c77. 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/HRA260812707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe249c27228c2cb55ac8e36e801f60b36f6b09365b7234f0f66eaef05a5e07c16. 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/HRA260812708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e087bd1247472e0629f5bc2861ca4a468ec45552bf2275d6a6b703eef0b67d. 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/HRA260812710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf96abb02acc37124d0ce0c7428d17e2fceffd2be1af5012ceb69899a2b3026. 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/HRA260812712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3c9f4969e02b6babfa06d4a54b9b116ee8a2e2ee502cdf4644ad2aba07f075. 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/HRA260812714.
40 Velikih Hitova: Tradicionalne Dalmatinske Pjesme - Vratija Se Šime
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d55daf16ff284458f663db4b7d8d6c08cf82e6d1409bb013350ad66296bb27. 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/HRA046786204.