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 0x0d07c246c39f05b8f3947118b9d3cfc8c6285ee0e38fe77d8b9e9fc716339ab3. Chain 2 (Bitcoin): anchored in block 953882 (2026-06-16T03:13:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a486940-2e88-4588-a3fa-7825e9c81250.json and https://artists.proofprofile.net/proofs/artist/0a486940-2e88-4588-a3fa-7825e9c81250.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 0xe5523099c9917ed1c19708e3b2083b942e54455e8c537af9e79c3209788b889b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:06:25Z), 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/QZNWT2502214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe04ad0913024564bed826b0abad8e00b9b6dae891bb59383cf904d6b92523e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:30:55Z), 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/QZNWT2502215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77059242b891ca76a6bc5957c954b9e29485d931911d50b2b765d7437d87890b. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZNWT2502216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c268a84804876ae94411ee0c514a899ed2e93ba5b566ebb824f0dd3b61ee029. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNWT2502218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64ebc62ab38ab3e4245273521cef7fbc9f84c2add8ceaf63df5df057559e70e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:24:56Z), 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/QZNWT2502220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4ac3c8dfbb7cb74a8a19ca82b9e7202aea411555faf9d88d91f5193ce03ca3b. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZNWT2502223.