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 0xc7af3d88c5a86c07bc83923f97daaa660088b8fcde8e26392169b0bd70122f76. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/311168b9-c1a7-47b1-989d-a69e30e3bdb9.json and https://artists.proofprofile.net/proofs/artist/311168b9-c1a7-47b1-989d-a69e30e3bdb9.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 0x2a34756639a9c739236f500e0d9de5f978d5e2f9393bdc88cd5b43b3b5ffef81. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:53:26Z), 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/TCAEE1955465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a34756639a9c739236f500e0d9de5f978d5e2f9393bdc88cd5b43b3b5ffef81. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAEE1955465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c9f442f67deb7f49a491d8df8b46de5bef88bfcaa052d415b3a50b5a68f61f. 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/TCAEQ2091485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e8b26543fd8ce1ee0b3b74d59c3e83573325d8ba04c15ae0dbbb91fe830c10. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:31:28Z), 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/TCAEX2093508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00288443a07cead68f1f603b72f8ed90500c9c4a7b2e5177af179816937ead9e. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAFC2098119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00288443a07cead68f1f603b72f8ed90500c9c4a7b2e5177af179816937ead9e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAFC2098119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287b609c035c8ca378ca8ac1047c631a8eb35b06c129d1e519145767934dab4d. 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/TCAFN2109164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x287b609c035c8ca378ca8ac1047c631a8eb35b06c129d1e519145767934dab4d. 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/TCAFN2109164.