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 0x92caa3c00aa0ee3f7448b2ff6d5299dc41a6b605d0911351406046a4fd975604. Chain 2 (Bitcoin): anchored in block 954058 (2026-06-17T06:34:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45bab1eb-26fe-47e1-a918-5a91fb79dad0.json and https://artists.proofprofile.net/proofs/artist/45bab1eb-26fe-47e1-a918-5a91fb79dad0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
O Ljubavi Klapa Piva I - Jute San Se Zajubija
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 0xeb8a1f3d2b0a9fffc71c7a17623e77d3deda1fefe8d3bbfac33e957d007f9346. 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/HRA260710201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff6a3e8c9e9f21f7b5abbb86916c87e619d5909b26286f997c917fefffcea95. 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/HRA260710207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f378547c9177fec1f0ea949713a8dd49524c29cd1fadff22c6cb6c1406c219. 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/HRA260710208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa30c2addba139cb15d70f73efb11b3fb83a39be12bb7bc9dc3f82f2372ba951a. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HRA260710214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x963e85893b722e3bedda3f2b62adcb42bf90a40c2805cfac28fe6a2b25bbfd33. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/HRA260710421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0b64faa44a5f1f810e4d6f711397e3f4cd6e809beedc248a7c3918bb2f6b1f. 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/HRA260710436.
40 Velikih Hitova - Klapske Pjesme - Samo Moru Virujen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660841018b4c29c8548e5257bc7e055ffa3bf989597c7092a32b2ce298203e5d. 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/HRA040644759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870ba592eda359ec9c003b2c45a3c9fae30428147b7d5285275b09bcc6f55377. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HRA040645940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x367d67e13122c8afc49cba8b45eb239323a81c5e3edd86924c6745eda09101cc. 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/HRA040606629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8476cc3044cf28d88e4f37fed1e69309e32318a62e90a51f749f484b3c9c5f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HRA040961122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bab28b304623adc23e409781ead577f89691cde818331c374e665ad962607e2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/HRA040960722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68601d822d945ba934b18f2fef6dd0af7d64bf8eb684b8f8425bf7148fa8d025. 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/HRA041166030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d3bc4db4f9a94d1b6e58f2c37c2ed48fb202d2a0bee1af66626b52096da006. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/HRA040628080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd688a23e22023ecad4346c8540a8489ea45cb91ed823e0725f84e17daeeefd78. 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/HRA261626916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c510f5a35222a7b728bb7495582a433483a842fd337cd4e685579f12c69ebf5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/HRA040627698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7269c527f2a0d4b1bebbd64dfb7456598d0f640a759cec76eed9035952a5780. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/HRA260915007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b290cac565011c6cc36c1cf74b7f6c499b277d3800ff44c5f36f8c936cc5d74. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/HRA260915032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f9f185de1071a2c2586fc333eeac528ba7bc18b42d4594fcc0c454da2329c5. 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/HRA261017101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c3ee91164c6c7a794f89dfebf5c201d866aaa6ba37b7abae9d95966d3abc892. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/HRA261016819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12124c32b6ea25599075dd5a4297048b3424ba33828c0f5371b6afa0abcb0b5d. 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/HRA100401097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349d41de31233a3f5b5399931c6f19dd4a637251cd15d96ac57221b442d7a71c. 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/HRA100501557.
Skradin - susret dalmatinskih klapa (30 godina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6e65a9ef9a08d69befe41d54402b96fd5df3255fd548cac3dac39a2de4cf870. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/HRA372300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc9e587582d597999ea513004ccfc1eee509970162dc27dc5a3e5ac0dc02528. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/HRA372300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0745284d2ad33283492a63c64c9c44d7db4192d893fe37b258a2e64e6700f106. 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/HRA260303302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cdc4607939044ebd621f5741855262c27bcb73e37d95e9e7a5bbb5e452cdd8. 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/HRA040637116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed63ab62ca527f6ee08240c789b057d3d43b10a45c620888a0b076ba3dd38053. 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/HRA040648034.
Večeri popularne klapske pisme - Kaštela 2013
26. Festival Dalmatinskih Klapa Omiš '92