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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b169b78f84a498b997708867a669c1a7fbe48b67b9522aa7e050596050fc06. 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/HRA4C1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5cc5b080fcd0382f48b38be5f647da7253a0048b92b62b82604e93f816ba8d. 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/HRA261581301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dbefdbb415762cbdd3f2588904e4dc0d334e5228afab34e1b43c38b031dd7ba. 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/HRA261580701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x129122805a7947b2ba9d077d9c2e4da47a00cf04e77d48b56b9e16f19a1a67b7. 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/HRA261728406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3b3eb4cbed23d180a8d5eca7de9af14436111a9ca90fcae249e8e67c462d63. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HRA261727517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24933e0c15d54aecdd49b4d7bb6e5d305409d5934ceb9b99ce3e180a7099d561. 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/HRA261680025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bd5dd897b47cd81a85d462cecee3950b441ed81cc1ec94846790d1cd316383. 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/HRA101204732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c9d74a37dd1b97701e5747cfe05e0b0b0a6ff57447b2537cd4ff611b9932f3. 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/HRA101104383.
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.
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
40 Velikih Hitova - Klapske Pjesme - Samo Moru Virujen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db2a01f42c920ffd4223eb82f67fde5df20744ddc6bbfdfb020635019b5e1a3. 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/HRA040961464.
100 Originalnih Pjesama - Splitski Festival - Ništa Kontra Splita
60 Godina Splitskog Festivala - 60 Velikih Hitova
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb86a9b18b6bdf1b47b7bf8220753233d7122f74b39ce3e57bf428567cd65a64. 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/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 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
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 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/HRA041685713.
48. Fdk Omiš 2014. - Večer Novih Skladbi