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 0x0e6645a18a08f6f4b13766f48376fb5fc9933e0c101c10d5a17b98d801a1591f. 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/94758392-f698-45d4-8e7d-e6998c247654.json and https://artists.proofprofile.net/proofs/artist/94758392-f698-45d4-8e7d-e6998c247654.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 0x481b11fde1782aa6c995edd982bc31081881ea15107382c26399a2db90dc5666. 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/GBWUL2422225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe0903e8419a13a3c05dc4119f2b6b24aa04b6f381dcd997dae4bbfa82853fe. 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/QZZEB2384929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b79dc1d0f1ee26b08557b6f6b7f27150ef8095cbd3733877e4d577c535ff02. 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/QZTRX2402152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e23de022002c4989d99527075c2cc7e42e4aecaf707fac2f347a9282ccbf81. 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/QZWV32443573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03557de172805807d03d07749fcb80656f8f43be8d3a0c3bf1e6c8e4a8734418. 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/BKP9L2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d6151b7da28d6f52d7df7c8b6aad9fc8f469fef72ee50472a139bfef2204f0. 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/USLZJ2596521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a25e18c32a27c2e2409e304c05a4be2f427d6c653e550a90f8bb38927cdb1e. 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/QZWV32420637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d2de54b55caf1fa9d305e1097ef8946f47d93ecfedeb3a8b65dda07dda9340. 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/QZ5FN2471984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362c5b55d8ff9443945f85e3be9b33ea96d618197aec6580d8f8104b555af826. 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/QZZ8A2376457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ecd82aca20780700a761ad994224912a4b6a39146d832e5d9e1f3fc97c71f1. 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/QZZEB2468751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b98a8d88a47d36c839815bf86dda9dcb89737de8f5f5f5bcc63a94120c857bb. 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/QZZ8B2468393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf141aae60e9201aa6609f0165c4b951f04e63540ffbd220a0e30e08aac230a. 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/QZWDE2442285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a0210f59076d44c6cf7d2427defcc9f4c67adcce35e37774a4fb2a82f46dff. 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/QZWDD2456939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29200426782a337d9e36b9867dd9b47bf733a291ac342035ca6689f34fcf4a4b. 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/QZWDD2447421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89faab4ed8815c59c77acbdba598beb8d4d8ad9f8cb73d236fbe6ed0208a3141. 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/QZWDD2420901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe861ef70d5b47f6d8321d29656255b799145e846aa93b0114734877efa0a28f5. 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/QZTV32482595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84eec56a70175fa479106d9a3faa63d081b91947714d9a388fc9d8c0cc8b2269. 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/USLZJ2475861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0794b1c4c4417489c81ff5804c8032b701601c8de1b078fbdcc4398ecd3a1c. 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/QZZEB2303481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecb79351fba33cffd455f5e9e622559f140742ce2038ac6423fc9bb896af013. 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/QZZ8B2348746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7153781d4673781a342e2518f363e7dfbfbae26f58b9651e0ab991b5ee1e87f. 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/QZZ8A2338176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f6cbd7d74a7aef4b20285b82803dc02751019dc17952bab57752a65779ab77b. 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/QZWDE2388593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe96e4693dfabe2eb61219a3eaa86f61a56182958e70e4cd10d058242586dbfcd. 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/QZNWW2253018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824bc903723d43caa0d28ff0683dc2796d9a9d6b0008bda815c2656c8a3c15c8. 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/QZMEP2381460.