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 0x59e7fc94c413c2049c0bb5c8f1251987d4903204166f8212d243a1341e907311. 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/c2e86826-7a55-49df-af0d-18c7376e1291.json and https://artists.proofprofile.net/proofs/artist/c2e86826-7a55-49df-af0d-18c7376e1291.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 0xb102dc18b44712d2dcc226617d87e1ca479b6bb8c107d611e72af4fee64d67dd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCABG1207509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a45d6ae6d9b681ca610f8f77cd5c58dd44f0fe52c648e4a63df247214cca0e3. 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/QZGLM1999136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabdb0475e2be98230615a75f20ef86b5546029c90559a32b3b5ccfccc1ab568. 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/AUMEV2419565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba5da727258f9e85a7a605cd545e8dd81e858cbcb3697787be3171af3c78b36. 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/QZW9L2374824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fb0c3327f6ec1ca57322d8b185c4ca5f286c264ebd94d8c6ed7a95b126a571. 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/TCAGE2280742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771bed4939519fdfa496ad5296d10b1c0d7df55b1fbb246b6fc8a50314391404. 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/TCAGE2280749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9443634afc534eafebd8352a6cb76d309ff731bc0819c99a129b3d45744f34e9. 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/TCAFU2124127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7884064fb1d5479f9a815be823b2ec38dab614c46a4e936a5eac5be2639ef8d6. 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/QZNJV2082063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d991d854ec370de4692d8b2d856d2ce9840c17af895272f5ff1db8c5aee23d4. 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/QZNJV2082064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaa92f31dd48d163646c3e5047da32af1cd2d8f3478caecb4f10eaf869f67aa5. 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/QZNJV2082065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7958d24d5f803f411f2cba7f6d0c366f46bfb664fb051ae731ec00f0409b998d. 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/QZNJV2082066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3d18ac9fde6bada9ef394f491eb1d434a947730e671bcefebccaf6643e1a26. 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/QZNJV2082067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3002d1a52d7609c3046f82ec93a2ad9d0117fb02bcee1ddec763a9b8a258a22c. 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/QZNJV2082068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd14758e85f2a3c0086d9198b218b84e94ff346b617f8616533adb5d3673ff05. 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/QZNJV2082069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7a713b33131504a597b7dd3c1cba6fc9490c4e38755ec2f7c2e2a6d7471f5d. 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/QZNJV2082070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d7884df8fc77adbdfb03a15d3c69df0c7157e9464bf79e8040abbad4c3e7bf. 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/QZNJV2082071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd75236979ae600aa0489f29987a7a6ca83fa5791de5ef5a6e8eb1498ac6691. 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/QZNJV2082072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31400058aba20100f7b5f8fa817c155f3527497137b47a66b04f7a090c4d4f6. 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/USCGH1160596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa256b8f7a40773be50a57704723c690ffde6f26120905c203f193609edea8d0f. 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/QZNJX2390030.