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 0xf6b7265e73a15ffe93b5149307c618a78abfe6d3b389cfdac854be3338ec180b. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/754420a4-4245-4c6d-b9b3-691ab0d5ddf2.json and https://artists.proofprofile.net/proofs/artist/754420a4-4245-4c6d-b9b3-691ab0d5ddf2.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 0xb7519e75376e5983a71bc80be23fbf834f665a43bcbdfe8dae0ad3b8f43debbb. 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/TCAFE2071886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065eb7bb4d9ada45c1294c534f5dc135bb008332b1e4ae2c79b89a504381f17e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAFI2155474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd143d829aaee0723e5c99e2c65f0914f1ffbaff24cc7fc4b44def4c07bf1ef4d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAFK2110262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ebef90a632554b7b7265b4cc1acaf0c00c43ff30d8d221f106a5f37ec8d4a6. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:23:24Z), 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/TCAFQ2117593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fcea28df22355cc43761aaf74380b8c1976aa8ef8ba3d4c7cffbc5a8faed31. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAFL2109266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccf44b2c313d63f354240bf71bc5aacda7bc72744b79dc6bffd5a33f037fc26. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAFQ2117445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f7dcdcd300a8cb19ccfccdc6839d57e4705c5b6cf0c2cf24a5627ef7df859e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCAFQ2117666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538f310a70b7ed04bc1eda8121bef62c7f5d8f79704707ad586479c1d93afde0. 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/TCAHU2475581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbecf81a22111750487b3cbc5023b95755fe943e22b332918dfe1bd905f5c3bb. 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/TCAHU2475610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280b9f8c1fb9237d4475706c0f4861e8631e04870c8ebc4bb69a2906e30c3e49. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCAHU2475655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40a09e46f13709df81df346b8ddcee5ab9c80f65723fa3b3d4f9b7b2a04252c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAET2036301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf411fc49f5b37322e0869285bb32dc4142477104e190407ff015e31471a0c3. 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/TCAJE2514672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd6662e1b5c8369de29d12d3a7925ec0221f16e0b3a5ae4c455c19e5b069148. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:29:23Z), 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/TCAJI2586825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b987b4f7a4bb0ad2773061dacea2e4721da7ec460aa7e8567b4cf0d9395be6. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:16:45Z), 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/QZTB22529295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd124153873b8af25328485e7de868857f83defc35b6a58fc2bf163c593a8304c. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:38:55Z), 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/QZTB92590029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3dc32285faa62644571e54380f947a6e6480627dbfed6feb07ca3f69136c979. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7P2516418.