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 0x305314df636be9d1533827a8c138137feaac64781710d7b7391f6fd6246f0f18. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcbbda2a-9f62-4dae-bf80-e7649baee4bf.json and https://artists.proofprofile.net/proofs/artist/bcbbda2a-9f62-4dae-bf80-e7649baee4bf.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 0x4d6beb3acd8d001cd7205c0e76354434538e0d3e41b7ce3162b2274404ac5e32. 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/HRA046168366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a94793083a873918e4f948d7f1b5dfd5b452138208b86c33ed9e9ca1d3874b. 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/HRA046168368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0789a0d387111dc489a1e9023d9171f3daa1cf800997f5ad36a13406791bed1. 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/HRA046168374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf63731c8ad731002793c6a178c72eb9f41ebe71eeaf19a9ee16d60d47dbc9e2. 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/HRA046668400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52f5bdbb95ae3db2f5dc36c094cd961a8a993fcb2c295efa3c11ebb2218503ba. 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/RSA131502311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad92315f9948bcc002cba08aa1b550bd92b391cba3d11eba1890ac19dd6b650f. 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/RSA131502401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x022c12f814f602d6eed668888343a0ea83aead45ced042b7cd34b047d1a0dcb7. 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/RSA131502506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba58b1ffd2ed9fa7d156b876966794b1727a9ea00dbeb943413ee2f1b629a7a6. 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/RSA131502511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe362bad3f5bf2f1fb79de32ed8d50a70a04628c35b8caefea3e98bedbd3911b5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:59:03Z), 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/HRA040838455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21031f20ea0829e8c2020759aedf762eadd79a6e6803ee04810b1e5618c38748. 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/HRA046643782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8683baac52bd7b6896c50bdddb58f33ac0cce13f8ed585457cd00f4bc69c0c9. 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/HRA040649021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58beaf7718efea7b5a547605561a6beb59e9dcf80406bb37386db9be7cc70df. 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/HRA046046853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd1fe33ad3f685793062188b13e986bb50957d911cd2b3d45bbd23d65e9ced0. 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/HRA040755072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f10a68db4ebd12e3192b5d9de4bbc7e950dd89bda720ad4e7d2069e12a3996d. 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/HRA046440238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f9a54338d6240de7e457920c85d9e5ae93c15b7e83990bddb5352ba3fbb22d. 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/HRA046146852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b7d09ba75746878678cec1b52f527ead4cdee0868ce77e289445cdee23a490. 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/HRA040611947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a6db9250343a0f42486e0576facf45e7fd29776710e33899b8f4670aa47e72. 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/HRA040545080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a3cb007c75c8880acf114955682f168a3437152083df41038983094e2b2917. 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/HRA046310570.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe625790c9aafd4d63734e2746c978ab3df5c2d31958e6fb7e5a0d41bcc34719b. 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/BAA052025307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4addd9e2d3ce2b0fbb977d238bedaf25620fe24c7969998d03d1e6b7fdb75f. 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/BAA052025304.
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
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc504717461042db81da24579f28bc1c5548a0840c209205457d3aed847d31d50. 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/HRA040858589.
Festival Zabavnih Melodija Zagreb 62-1.Ploča
Festival Tamburaške Glazbe Osijek - Zvuci Panonije '85
Xiii. Internacionalni Festival Zabavne Muzike Split 73
Festival Zabavnih Melodija Zagreb 62-Ploča 3.
Zvuci Panonije 83 Osijek (Xi Festival Tamburaške Glazbe Jugoslavije)