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 0xf17fb1f8ae39bd1eadf5689077f4d8c38d665a6f5e3ee8bbd4e8412d57a3f8e2. 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/f2320e6d-f7c4-4128-a5ee-ba54feca9ce9.json and https://artists.proofprofile.net/proofs/artist/f2320e6d-f7c4-4128-a5ee-ba54feca9ce9.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 0xcfb2e35c44e51b25b4f47e89155cba55ad13639036c66b86f800243ff482fbeb. 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/BRECI1600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x891d738dc09ec3f63afe0c79545af2c9208b90e386fff13ec82b7c058cced0b3. 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/BRECI1600014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b1df66db85382d5645055cf09d8dd803e6bc6a97b61f3772b5e1e5478be304. 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/BRECI1600015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a29310696d8692301d8dddf4d38a11276700ed6635d8c74804e43d774ee4038. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRECI1600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786ef8468f177d6227a1cbba4aeec2b872e744cb7f5bbfe05f7cf5d72deae41f. 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/BRECI1600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95fc8f82dde3a47ac3fc2d4b82b66c5bd08665c66e74408ab4ca7d30531a871. 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/BRECI1600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10174760ffce0f12be48929203987bdc49a45ae49a745b335ecf39331b64286f. 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/BRECI1600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58300736adbb74845a7e511e5a98e751215225bb827307122dd469dff28f3ca. 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/BRECI1600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de2d444a0e523892580363df535b42e858f9ad892b42b88c30c88cb366c02d8. 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/BRECI1600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98946c46edfc33bf1a90a36bc8ddcb9f3f412147b838b9ca38b63f5c511134e1. 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/BRECI1600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe187416cd5893bc32b2b194d3a4084d52c2eb797519850f777eeb1fa24a8be54. 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/BRECI1600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeabaac7bc520e90da91f70ca3d977b1ab719b1f3f93bcedf47a20daf2df0ffe. 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/BRECI1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9088cc836c1684debf295ac49a38ad6bd20a8f3e178628806d5ac5b145955e73. 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/BRDEP2300543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd5c70950a0f9b7b845db25d5722793c822ec62e0e2e2c3634724ebb7a9e302. 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/FR2X42439549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665dffd1375f3ba428724a8852fe8e864c637beb735e5968dd5dc4c08e1cc05f. 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/BRDEP1700062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d58e8582233096cf5c9b44acefefdc2dd75a19024568500dfa2ec99da69c35. 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/BRDEP1700063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8884d740ea91547df38e7b39dba548e8af7cb40a0b5eb39276c4c5f94139ad. 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/BRQM22300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8884d740ea91547df38e7b39dba548e8af7cb40a0b5eb39276c4c5f94139ad. 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/BRQM22300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6484d854972ae6f0024b9b2b0cb85a4357273a0840a1fc6aa0c6ab7942a4f826. 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/BRDEP2300340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23711e527804a3670b8a465bdef60a2149a5d96e6a9f93a33aebd5d598fe8fc. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/BRDEP2300182.