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 0xff839d04bc338612633a4360fdd78126df6f7f0ec4b94b0a98e3057c8938074d. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4549077e-9d88-49d0-921c-f90045f06649.json and https://artists.proofprofile.net/proofs/artist/4549077e-9d88-49d0-921c-f90045f06649.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 0x1819c89749873189d15aba3f3597a476ae817a6beb1680d627b5c29c2ec9de3c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TWDZ31800102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89868b40f32ad82aa4c51a76e0b71093019b1202937d96d32d8b57e4b99c73f8. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/TWDZ31800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc5eaa3fee08ed8d1d561d07df9a14e29af2b87565d9a6773714920031fff99. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TWDZ31800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4daf2c424f3df60bdba8dd5a8a21898390be574524441ee913737f60bc246da. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TWDZ31800106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895a21480d605beb9757c0eeb3a8cb686e0360d0425632c5cdf70c7cb82b2b3a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TWDZ31800108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fe0d0ace3357578f41cba6fa9f0220565656435d6e7ec09cca6d771b677077. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:39:34Z), 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/TWDZ31800109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068af69d469c8d9914a306101be1af059034aacfb9c6f864befba94bb11253d9. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:02:31Z), 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/TWDZ31800110.