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 0xa38bc078f0bd51cd130788630f2370dda934fec97bf023df070b5ecb84f210c0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e476341-b46a-4d75-aaca-9b9817694d8b.json and https://artists.proofprofile.net/proofs/artist/9e476341-b46a-4d75-aaca-9b9817694d8b.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 0xeee0bfe1a54ec8daeafa8470d7ef167a1c9777af96e4451db3fb27e941d3c284. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/BREMI7400899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d221c7beeda49e5c5b53bc0edbc147f096fd7e376a1b7224958ea942fdb861. 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/BREMI7400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16649a7faab3b5e2a214f83717447bd1d5421593113b648353fc88a06ebda37. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BRUM71900018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf8ec1c7913a060018d8b32992f120423779047bfca40d65df6d97478c57fdc. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/BRQQI1000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae220a2d52e467a7ea71200cb5d347c282f6efe42a9aec77f31fa30b1a344ff1. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/BRQLE0300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x511cf87cb0d72263543d840f477c41935a7c997ef8125c71cedd204bca522d90. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BRQLE0300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa65e747776189a3510cf9234e54e93baf60b8a6470a1a1d370817c4017df12e. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:29:03Z), 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/BRQLE0300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46bb6749c82def9fd2ce389f6973f7f90729c427e1ce1628e8cd2768eeff19e1. 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/BRQLE0300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245940c933a1c7432a8609899e16a8f6dcb15d66bebf41d8ff9f7e0e2b79f322. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRQLE0300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c2453ea0dd8d4bb6a79809ea696a20859c49579cab35a136569d4604496c2f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRDPA1500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a728813b8205eafaf2f5fed28e3a4c0d1414afdbcbadf54215ebce180ef85e. 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/BREMI7300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575c982304add41563d25ccecb53a18ed58ff825efcab828b4c85f2ae7e8ca4f. 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/BRBMG0500425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f50af065dc323761acfb2f485faac444a412a60f2c954823634cbe3d35530a. 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/BR3GB2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8154f4fb08ccad55f8dce4ca64feff8cda15ec0377d7bf55c166d5b74677e52. 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/BREMI0900335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb045b2833c7d1710a2b41a2b085845e964b413094cc1f1e279600ff9287bc3b9. 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/BRCID9600127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb20e24fa4370c749ed57b1ffa62a065112f0e5db717c1005baaba289456ada2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/BRRPL1500034.