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 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 0xa0d19962ba4ee5a4531271ba5adfd949480f73ca76f8e58db2b3c989176e4718. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9873bdff-b1e0-4524-a49a-7ac675cfe852.json and https://artists.proofprofile.net/proofs/artist/9873bdff-b1e0-4524-a49a-7ac675cfe852.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 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 0xc1164464e94f4367f702c36dee458172243c768891a02067e2c90f6b89730918. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/HRA261680028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b169b78f84a498b997708867a669c1a7fbe48b67b9522aa7e050596050fc06. 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/HRA4C1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe64f4cc518aa144d620721d38a5173a56e9e86dc964a6b2e1bec53806241d2f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HRA261727512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5cc5b080fcd0382f48b38be5f647da7253a0048b92b62b82604e93f816ba8d. 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/HRA261581301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbefdbb415762cbdd3f2588904e4dc0d334e5228afab34e1b43c38b031dd7ba. 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/HRA261580701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129122805a7947b2ba9d077d9c2e4da47a00cf04e77d48b56b9e16f19a1a67b7. 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/HRA261728406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3b3eb4cbed23d180a8d5eca7de9af14436111a9ca90fcae249e8e67c462d63. 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/HRA261727517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24933e0c15d54aecdd49b4d7bb6e5d305409d5934ceb9b99ce3e180a7099d561. 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/HRA261680025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21804cdcc8ad8058a16d7c81e894525cab45c8de2745a2bee8cda4a04cb1ed66. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/HRB901400747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bd5dd897b47cd81a85d462cecee3950b441ed81cc1ec94846790d1cd316383. 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/HRA101204732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0c7d52a4b4112831a2ae15180ba93b3b8da7f1e73e9f86778e8a906875874a. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HRA041685681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c9d74a37dd1b97701e5747cfe05e0b0b0a6ff57447b2537cd4ff611b9932f3. 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/HRA101104383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77956174b537e5aba184bef608965fc613edada0b81ec5540b986b0a66741fcb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HRA261930108.
40 Velikih Hitova - Klapske Pjesme - Samo Moru Virujen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db2a01f42c920ffd4223eb82f67fde5df20744ddc6bbfdfb020635019b5e1a3. 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/HRA040961464.
100 Originalnih Pjesama - Splitski Festival - Ništa Kontra Splita
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x736501b107bbdc3caf4f89ba2ccfc59a986930408638cf73ec511acf3d782784. 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/HRA048816084.
60 Godina Splitskog Festivala - 60 Velikih Hitova
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd915f76855aa2eeae8147eecf6f51ecd310986ac5d123cfab8bb8948322438b. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BAA092100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb86a9b18b6bdf1b47b7bf8220753233d7122f74b39ce3e57bf428567cd65a64. 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/HRA042199385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0935ef67919a9687cc78c101ff1cc96c6e75b08d66e9f225ce2cacc9037f940e. 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/HRA042100333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b1836960c65268865db71a6156017c11423962fbf4205d97098721e8259af61. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/HRA042100709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd0d1f78e730d8108804a659c4b80c47ea8c90579aa547c240649e2dbd4a3ee9. 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/HRA041165548.
49. Fdk Omiš 2015. - Večer Novih Skladbi
40 Velikih Hitova - Dalmatinske Pjesme - Noći U Dalmaciji
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x500892300f03173ba983cba2146ce0f42615f4cae8ec0e1b6cfa06f73fba38a0. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/HRA041991375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eabed21d8a667e798a729bc09398b9e3f7fc1c57a079268a8ab73fc0e9f43c4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/HRA042199741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d316049d36288ef6d24966a0149b77b120564b7fd99e114e12f85d0b61372f6. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HRA042400914.
Ostavljam Vas Moji Najdraži - Pobjednička Pjesma 56. Splitskog Festivala 2016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f0316469e24ef5e31197e4ac822151459a39626b797cbccdaa3ccf0298e8ec. 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/HRA041685051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fe8a7175ba4cac86c306325c92d3ccb3ed43e0174441b04f33fb8aff701aca. 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/HRA041684780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6f7d89974f39e22b961e264f21ced56e6c4179a185ffd31d723d9dc0c77f0b. 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/HRA041685713.
48. Fdk Omiš 2014. - Večer Novih Skladbi