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 0xa307385a6f13d1241bdcdb2d7fbd30c856839c694808cf9a3c0186882a9bba30. 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/1fa8ca45-340e-4ca4-84cb-e00f722fada3.json and https://artists.proofprofile.net/proofs/artist/1fa8ca45-340e-4ca4-84cb-e00f722fada3.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 0x429bd976b80aaf45c2da3017d4871a88105c041ba756100f9c24da68685bc75e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BGA261114755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd83de8840960fb2cfe94aa2c6584c4ffbd7ff9b329f9824539f6486cf271b2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BGA261114756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a51c17b4924dd2c6b040361e4e2fe90aa587cc1dc70e795a8e1dd1741a8bbb. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/BGA261114758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x874c45c1aef59da0fe44685c102b7d21063cbf587989126d4217dc9247c8099a. 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/BGA261114759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6c82d0688644cf016e80729b30e88c98c16d7b57a4635cc710a3b741d54eca. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BGA261114760.
Zadnja Piva (Folklore Songs from Serbia, Crna Gora, Bosnia and Herzegovina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd0d1930d613742533bf9478b9a752a298d99f1b838ced41d8f7429495b1d54. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/BGA671234235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d63057697b60193188ecf8bed3b52623aa4398a9ef530de4ef5b879b35cf4a5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/BGA671234236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7615cebebc27b2e7942d91fb5cf7c910ba375a3faa2f3681b7f6889cf86aae9. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/BGA671234237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x035191ad8e5a53556e8deecd1a719bc453dbcfbd5c11a9fae67f19cd3d7b0354. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BGA671234238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13d7c6f292dbd82b2fb520e2c32fd5fbf4a167809be2832e7c3cb41d241d1d0. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:04:14Z), 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/BGA671234239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x314bd27d768d34764f5e1b89a943c4051c9610b912577d4fadc4e98641821c16. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/BGA671234240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x436a48b55c0970f42e97dcbe5cd51985f0b7c183855db06effeefad0863df03e. 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/BGA671272029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfba17dc70829f18aef7f8a38324e8c82d5b8019b712282482290840964336c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BGA671272030.
Etno (Folklore Songs from Serbia, Crna Gora, Bosnia and Herzegovina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe2759a6d837964423822ec9515eb54be49e8385da7e5cd5e7a532f265b6490. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/BAA052341931.