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 0x2e33140d173f651be7eca3f07987523edada94e87ccfc01cb0cc1c53f258441a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4a9e347-e621-44a6-9acc-4aa52ab47723.json and https://artists.proofprofile.net/proofs/artist/f4a9e347-e621-44a6-9acc-4aa52ab47723.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 0x6fea3c0c03c7559aea277775c8a79f91ded2c3d78e77ade888e93bef220da8f6. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T21:00:44Z), 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/USSSJ2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912192bf1c85f99ba40c9e0064c73106132c1d5673d01c15452580fbae172d71. 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/GBJCN2226701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x371b443f67b0fc0cdbc0408b3277f77fbf590aeb0f0472f65697ed469a323417. 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/GBJCN2123101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc92ea8509511755da14b7e51e90dc88bcbd8c415359e87535c0bbddeb793c3. 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/GBJCN2123501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e94d54528e30d1631108bbb88cf1bb2ea76c7eceefa81a144e697de4390b0f3. 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/QZ7WF1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa886d23bdc517cf035681cb949614485d4fd266b2bc672ee45a25db4823155. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBJCN2122201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912192bf1c85f99ba40c9e0064c73106132c1d5673d01c15452580fbae172d71. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBJCN2226701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa886d23bdc517cf035681cb949614485d4fd266b2bc672ee45a25db4823155. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBJCN2122201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b575e15ae2ef7cb283ecd7ec403612cb0fd0b485235e0e71fe61fd60e6173ed. 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/GBJCN2019001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc92ea8509511755da14b7e51e90dc88bcbd8c415359e87535c0bbddeb793c3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBJCN2123501.