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 0x907fc3e10e212e17e64df00ba112785471ccef4a45873e66768c744813a296d9. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a7a5cd6d-ec70-4e12-b7bb-c9117ee02514.json and https://artists.proofprofile.net/proofs/artist/a7a5cd6d-ec70-4e12-b7bb-c9117ee02514.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 0x100451a4bb4e13fdff12a41c7f377997ea9f44e8ea652c00c66fea7a305136c1. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:24:51Z), 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/QMEZE1830589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cf4ffedfc8b2fa468f566df1c1c23ff92d4711bfc73cc45733bd799bdc29d9c. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:03:59Z), 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/QMEZE1830591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5919a4843b2bcf6984617a57e429df19575ce4dcb8714893fbffe350329e3a5. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T23:00:13Z), 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/QMEZE1830596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d941d30eec6b37a97af530f4ab5e217f2f62b486504bf10fa3d637d6e7bd06c. Chain 2 (Bitcoin): anchored in block 957680 (2026-07-12T09:07:22Z), 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/TCAFW2147331.