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 0x1d6c707e0e0a92bceb01fed9679b94e431840be23c42725bc948429ac66c93a3. 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/1684b3f8-e8f4-49d5-accc-69eaa8c40af5.json and https://artists.proofprofile.net/proofs/artist/1684b3f8-e8f4-49d5-accc-69eaa8c40af5.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 0x17af8bf6b133c081ceda5d15ec164f9e4a8742137f7cd24be9034ea6a14290af. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCACQ1616985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b0b631c7824cc1451f0df5ce5ecaa42b966bc49089ee4346174dc668008d45. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCACQ1617062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832a3e23ab86e7ce6c710312147efaa54bc7c1c028bd6d2aa85d13be52eca04a. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCACQ1616992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09655a98188bf39e536693dd81e965b0a05e8a198a0c03fea9a8158ba12ef9ac. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCACQ1617000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1517157f4c62f4e1c8cfd6153594ef76fd213e1f8df228ba05ee2f83d4e3fb. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCACQ1617003.
Valley (feat. Zefora Alderman, Deryn Cullen & Lucian Nagy)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfa30662a057827369ed0179d732ed5fb762844c807f5f8b0f6f68bcbb403e8. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:43:28Z), 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/TCACQ1617014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c65ad6d7ef9f5549360f94d237a01e3e4ddad8391779fb24ec981730a1b09d. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCACT1648491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8142f951bc92a29e0a7a322bedfd4fbcb3ea7a435797e9ca6dca540d6f7e09b9. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/TCACT1648501.