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 0x6bad58ed178986254cc685e1d86f688f8b2b13ba3b4cc518484d5230699b3c68. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc4eba7b-b60d-4f3b-9713-80b1faec8101.json and https://artists.proofprofile.net/proofs/artist/dc4eba7b-b60d-4f3b-9713-80b1faec8101.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 0xad37cffe7b7da6a82081d69111b11f50ebdf224e8a68f8dba625160523503515. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:14:00Z), 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/QZEQU2149359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e8be67e1002baf940952df154910106ecc4ad7483db4a94e3fda6e27539422. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZEQU2219129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b0e86fea2aa016e3238606d1a50cc24cd000a24f715ced438343003c8ca06e3. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZEQU2219785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4c47c16248b3f456e0acb8f4838aa2a8f02f7497207e30a43a196db747f5cd8. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZEQU2219787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fc9fae9aadeff1b7ade8417731ebab271e8dbc041d70401c2b10b8ecb4a001. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZEQU2251078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce03a98a9eafe63e92f3d265520b88fbd69f574c3b48b136611baa391677e02e. 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/QZEQU2251080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c8276ec17c8c0114c170379487ab79bbd9a87b4bd13b4abd77843a36ab4881. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:40:41Z), 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/QZEQU2251082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa57347aba581bc88b8259a294168c45ceafe7563340597b4d3ec558994bd1eae. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ESA112300497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96656a1553507d882f534735516b36b66de982aeef1efaea668da7798d68518. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ESA112300500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a2b8d6cf5a1cb67ee244160cef68cd5fc506b568e22b67b7834fd47a730a50. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ESA112300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fbe140f60d8d6cbe8b2655a6cc935abb8dd8df3cd3e0538fef19413d7217be. 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/ESA112300503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f5ccc69f6a7b0d1e04e5b03123f045353c3d6c8974891312fe1b4b9dc7bac0. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ESA112311756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c48af25547509e3f1d1107437222a112063808d23e4117d5ef0bff26ab1728. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/ESA112324843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17df7795a5ec4bdeb29924b9d99e390ab2c82a1fcaf04614494c6e4f7b35759c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/ESA112324844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cafcf2efaa3ef91effbbb321e824abc3d8eb2b864ed704c128104e61278d21d. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZZ762528410.