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 0x30a53b7069d94bd2d6998e36472dfa38917ed0a4f370396052134bfa104c33f7. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d42b7ab8-7642-4fb5-a408-2b39f1d0a181.json and https://artists.proofprofile.net/proofs/artist/d42b7ab8-7642-4fb5-a408-2b39f1d0a181.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 0x4c1dc99970a6234867acae66bb4ac478b115b7ec3b319668ad4382f30040c00b. 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/HRA047566451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697ec25f68a822d5f20ef343ace33ba8ab82449461201f7764e3e5700461b330. 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/HRA047345084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fcb6bd7cea4462763a93fd3a364cb54b870434409fc4e840d7367e0c58ff811. 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/HRA047043237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87dac5f95ce38a1bce5ea9cd265f2ff3833371223cc2a71bc1aec83a4a59a039. 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/HRA040627344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d29f69f6d0e67b80ef4599f73bc6f5be8b7f5156949100813cda9ba9f8bb896. 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/HRA047166548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d636141ca4b7f2d2dfe366572f6cd457ba9037050d24db6c5f505e7c13994e6. 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/HRA047015118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74737827d80a3866d570631e57fe31842947d429c9cfca0ea82d8e2f27e1a8b5. 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/HRA047226362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64214a151bbe64227f1ebc6d731bffddedebb400cb1237206bcf8a4474b82e42. 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/HRA047129310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d594acce8a691693f3113ad1a813a06bb096a10d7a061809090ae9ce098fc8. 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/HRA047313271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e34b5bcb3e5717c151d58f6ea265944a985841fe4d623899f7d2790f7f28a4. 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/HRA047108817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceab22bbd87cd74d4fa37b312c4c4121f137acb2d937c5fad3d43e330290ddd1. 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/HRA047126363.
Socijalistički Disko. Ples Iza Jugoslavenske Baršunaste Zavjese 1977.-1987.
Festival Tamburaške Glazbe Osijek - Zvuci Panonije '85
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d406b6c1eb75f0f2e75b6b74085d1cc36189fdcef6aea7eae48344298b619bc. 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/HRA047856650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873e3607cf1e7431170fb18a4ed9df262706ccafb2e94a402c4618d7307ba743. 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/HRA048457945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b09dd503438ff8cf549158d04839378d02fc6c73ba0850854319e4c049eaeb8. 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/HRA048457948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f1b9a277ce50852c56ce97d2790f4d968aebee8643920690fac260f4d2223b. 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/HRA048457952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e4bec664c0fddd126c4987f41262e984c5e4edffe844f73aea22a3477225e5. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/HRA048457950.
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 0xd04594f3bfd698c6e9303d5359448f4fe686c02f13a3a8bc5952fe2405e7a4cb. 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/HRA048457951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4b1a82a93c9b72299019741548776caf0f5e37152142869ea24e793c282cf8. 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/HRA040858514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1820bd335e3b411aec1533c729fc582e6b1359fecaec5ae84c2f377848f590e3. 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/HRA048365985.
Glazbeni Festival Stepinčeva Katedrala '91
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5926b8b02a9ba5cf5d87d4cbc79ee5d850432fbe741269d5e152f9bf62bb3b24. 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/HRA049125740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e280ebaefd43d00eb28653d0fc8b6b8f5da4b4bb48f17ae124902ec3631b2ea. 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/HRA049125742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0288014262996c49f238f62b077c288bfb2312e6afbab9794c8d1d907515e71b. 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/HRA049125748.
Mozaik Knjiga - Radi Se Jih Spominjamo (Box)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f595ff0d5b1174241a3cc5436c1d1877e2cfb2efb6e6530ea6115edbe6a1e77. 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/HRA046707415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21842ec652df7e2c7219c34f00678be83eba33dc7876ff6a80ec36135c9ffe97. 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/HRA048215229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f3446d9a62e70e9443087e9f270cc3ed2ed2a216b8ff479ab3db2055a91d81. 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/HRA046684567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d345a086bc3729d7b5781c04b447bf972be7d8619a3dc893a6455b0e4160d5. 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/RSA041700197.
Pitomača '95 - Pjesme Podravine I Podravlja
Hrvatski Glazbeni Festival Stepinčeva Katedrala '92
Festival Kajkavske Popevke Krapina 1966.-1994. No. 1
Festival Kajkavske Popevke Krapina 1966.-1994. No. 3
Festival Kajkavske Popevke - Krapina 1976.
Festival Kajkavske Popevke - Krapina '83.