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 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 0xc8b4ede2e53eeb846d268aa85e904fe5334a000782ed127f4103e46c36c5494e. 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/6550b16f-bb74-4308-a6fb-5db43a937710.json and https://artists.proofprofile.net/proofs/artist/6550b16f-bb74-4308-a6fb-5db43a937710.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 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 0x008d62cc0590814ebb23f1349dd461f3192490712a7a55b09cce29cd540e6a56. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ9QQ2300868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a3e01b8ce5c61c99d0128c06ae966b7def818d39640507f9c06f06fe6bc9f0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ9QQ2300871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb6071ef6c5af484899ad3361f50d46660d878ed22945796c07f1847a82537f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ9QQ2300498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088a596719dc6fbce8eda7a2314a165dbc108cda1037960989f65f9733a582e4. 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/QZ9QQ2400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd002d85c7b062112687bb6ab826a7c9de0fe4e60e267a6b279091c0d6d5dd486. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2291333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773d5a2950f20d7ced66433bfaa8fb408a06155a8ed3ffc3784c6eecd038808b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ9QQ2300346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64507e2d6be950d4ce3cdaef96e89a8a8228a7c89b3a09620bca2fd964640b4f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ9QQ2300338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db6f51d1b53e689aaf122eeaf8c0c89eae28baa641ad2ccf5f7f8563d8c2114. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZ9QQ2300336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa0641712239a945484d2b75cf063ca35b0ab59b71435522fafab836138e5b0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USDXS2202590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa2348e02be26f3a7a03f199426cde60a5987cb3728e929d91d73f30cb8e610. 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/QMANG2231113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9dfddf5f75a3f2f97a0a03253cfa0b239b6b53235dc878a557b904bfbd2f50. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USANG2222506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979432977130d45b664b62294c5c06fae49c53f5f79cfe62567c7828381b66b0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USANG2209837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27423b0ffa3e03c6ca919f8d3f7d0858f65e5dbeb880f9f7b77ae7b19ce3f364. 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/AUMEV2516483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbf9971fbc15e61a0ce2c71e6d876f74bfea9bbf6af741e8220dd3fad266484. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2516484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42cd5756bfd77f98675ba122fbe0d069a32824bd0a6806b9b218953efda8a9ae. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2516485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45df237ee5e194a5d061a4b63be6364ddb8e595c7c28f7518c03823e8ef9be6e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/AUMEV2516486.