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 0xb5ae1d480d6d7c3734b99f8e8ba584642aa6570df93a60e959087bcd7713334c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c8cbc48-394f-4dc4-9c2c-70d0e1ce4426.json and https://artists.proofprofile.net/proofs/artist/9c8cbc48-394f-4dc4-9c2c-70d0e1ce4426.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 0xc64f87c3103fe5c363779274c807d92faac2a1ff9a026b215cf0b547f6b43469. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZDA82051163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52fd8e8c362b7366819ee9bd432e095032cd92418a040c74840aed8aedc4f4c8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:13:31Z), 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/QZHN72007266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13dd0d323bcddac2fc3828d25a96ed9bb4eaecdb1e8a89594cca1341cf2d05d6. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:10:26Z), 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/QZK6J2030512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980a9d93579eca0cb6aee499532bfdbc2c27e9c620f6d6c579d51cbfb781c781. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZHN42542755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088af3c3cf43991d59cf9e38a2568770da8e3c0b67956769d27c3fb44ad778d4. 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/QZHN42542756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650e2731bfa3c9488badf4eb837054be389b5adc374ef58ef9bc119dc709271b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZHN42542757.