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 0xbdb285268d6d88e0f28da54a1f2aa40b922a427da3fcfed424629783866fc322. 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/7db7f41f-1ac3-4b85-b40e-d03a56681ea4.json and https://artists.proofprofile.net/proofs/artist/7db7f41f-1ac3-4b85-b40e-d03a56681ea4.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 0x7579ea22f4bd001b378d22751466aea1e09da76824834eb652e8b445057e9ea0. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZTAU2429396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7579ea22f4bd001b378d22751466aea1e09da76824834eb652e8b445057e9ea0. 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/QZTAU2429396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52884b2dcdd97de6f25260f7e230f360afb39c63c553c56ce781a7d0d98c9a8d. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:07:43Z), 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/QZTAU2429400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04efcd5f55edc17c9aa61a2fb57965afbe70d4523a5930d1e4567cf143a6ae74. 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/QZ8252211067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628c7ebed54bff8bfa7b6e929645364638b4e01075863229d21665bc09a32db4. 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/CA5KR1980430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96bf10e1e51907f483adbea274b5e31c899c245cfc4d6e71040f1c8ea055c68d. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/CAW112100358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628c7ebed54bff8bfa7b6e929645364638b4e01075863229d21665bc09a32db4. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CA5KR1980430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70244a736d98c76fae206a4fbddba57aee4918d9fe414aa2b06e54fa724983f. 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/CA5KR1837139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcef511c3fdfd1bf071e218f6f6ba0ed69ef2dd80dd09bf3ce4f9ddf24c4ba7e. 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/FR2X42289698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e0ec0d75f233d317633d30d8d4f16ecf767d47585ab281ab7cd34419786149. 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/CA5KR2059122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94a28b1a5b429fbf622f3fb73452c4492e6310460cd2a728a791c8d3361e988. 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/TCAEB1989143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c59db56ee7e1474b88d28cdf73be04c9a74254ff34ab403ab48d2b28f3ccba. 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/TCAEB1989149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605e90b6e31385f09ea33801d88431d539ab71b6f3c7a7b55728f56ab383e0c9. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QZNWQ2260420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x605e90b6e31385f09ea33801d88431d539ab71b6f3c7a7b55728f56ab383e0c9. 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/QZNWQ2260420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f17ba8e6a2bc3d811a3be4b522df434e11b7647f97a92ae5f7efeb17a62c9c. 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/TCADO1870303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b2b0c272734b1afe7471927399a147cc2aca882565c95be7867c157d797769. 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/TCADI1792929.