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 0xdef3c01496a8489ad3c6ab4245c13f24f8526b60866f75cb8ef5c3a19b3adcd0. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e781b69d-1c36-493d-bbec-fc77ceaa0fab.json and https://artists.proofprofile.net/proofs/artist/e781b69d-1c36-493d-bbec-fc77ceaa0fab.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 0xc19db9c82637e5b261558ab8c92835f17ea65fa438a26c843db7f77f3fcb8682. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HRAA41900191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59664dacc122bb0d5a32e1c45ae6d38e6bd0a558aa56ad1e719156f8da74c859. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/HRAA41900196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb96d585d0050595ecb9acb26f93011717060e5181a7470be199f8803474e52. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/HRAA41900209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96c2586697fbc8aeb7986142f9a89fa47141f3e1a4c9c4936021b7df37c3b62. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HRAA41900165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad32915b1b05c05f297c33a295a992c4441fba7e32a99453c0113ef4a2ddb5ce. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/HRAA41900172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf615f22f4e7c74b3da301b6324d31cdcddca5f138e2f9839e3acc7a7faf725d. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T19:00:13Z), 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/HRAA41900149.
Bozic U Svijetu - Christmas Across the World
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f0c5437c3a9804968ece40e0ddbd5ec380f5cbea219f21e8737e46b89a96a9. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HRA100501462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6112d163b01c0cea1575f86f31f0b2bad923fec6cbf355ead9145f2c5469505. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/HRA101205098.
Pjesme Naroda Europe (Songs of European Nations)
Korizmeni Koncert - Pasijom Kroz Hrvatske Krajeve (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c61d17e01e6793473f1432f3b3d53e8b4b039cc7d652c958368e30d7759bbd2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HRA101506944.
Veliko Je Sad Veselje: Hrvatske Uskrsne Pučke Popijevke