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 0xd7940e05408e8aa646a66e07c678c68952fd1f4ae433374d8cfd81706703061f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6460b30b-1317-4dcf-85fc-0484aabcc4f5.json and https://artists.proofprofile.net/proofs/artist/6460b30b-1317-4dcf-85fc-0484aabcc4f5.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 0x664823d33b3d8b20958f3ea2116a5a4644e39a7be141ac07d414b05ff0e3cf26. 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/QZFZ52070801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2f113c00b7e00e92e4d77e11145180975ca5604098fbb1af621ce653cdcdc4. 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/CLKT22103652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc1ea75143d7b52d1820eec8ae38cd507f3a48f69a564121d11bd473c113dfb. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CLKT22103741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0f0fab4ddcb201489113e20e806ee4d424dea66e61c5553cc6d34e5af5d443. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZGLS2267212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372448037f0be1bd12ced775db090f5f72dd0a3be4999ea2800f226e37317373. 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/QZW9L2244965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3091d9b540c02df079d8ed7060f9eceacec4118cb06cad8ae42eb5c6df57b477. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:11:39Z), 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/QZNJW2309139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f65c6b97f2596035356e89a868a652e468aeb3585d4cbcd73666bd8df416b6. 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/QZNJZ2450405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fee096aad3105e30926c48883f100d915e80b889bb42467da6a79c102ec5a6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNJZ2455053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9711c8f4a85f74e3717d05e4621acfded8d5248e0b9b6e395aa3c77d22834d93. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNJY2523907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d834f68694256e9642eb468735da4f4b6ea53387deb3ef503e33a9abb9e036. 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/QM6MZ2494987.