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 0x0a066a643dc0cc667ccd8df5585aa6cbac0fd641848a48ea7e210a25474951ca. 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/7ef3bfb6-07d2-4272-8694-f892da50b7b9.json and https://artists.proofprofile.net/proofs/artist/7ef3bfb6-07d2-4272-8694-f892da50b7b9.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 0xd53f588d38185306fbeb9bee63e86dde53bdc605135888bd711141959f2fb2e2. 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/BEY921508885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cc178fca7d91d3b405500bbc6a9cad4b6d116feecda4988f51bdba89387b30. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USQY51771441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac648857c4ffd6b6959417ca3224a71f8065eea82bd73ebc611ffd33f410273f. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:56:32Z), 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/GBKQU2190776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbc1931b9aa0708c45ad553070fe0734e0f99c7c8caa5aefe778b82cae2f044. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/GBKQU2190780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754a463db07a5566f03783856dd3ddc9fa3fca4d6099694397a0752208dd8129. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GBKQU2190782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942d2d79eaf34c1abc38c798e9d670899ddf007c0f0d6169ee2b1a2c3c8cf248. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBKQU2257780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e1df699fde07c967e39f73996a4afa8b5bac0d038adc2f21f4008b5c2e76a9e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBKQU2280704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d715023ec85eb7e4194ee5cd78cde5bafa8b8e8ba8fe91005639e7cf1a21eda. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:00:29Z), 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/GBKQU2392375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c7ebcdca89efb633fd69f8ead923f8632772f329a11f00b63911a95392e0cb. 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/GBLV62414183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f5adece54500370b5b70f745c8a64d0f2e318046eedcdc118d867f6497845bd. 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/GBKQU1590580.