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 0xbd5de324ee0fae5b842dd57ec6ee82736c7d3d9ae31da0c71aa6d2f6eb6fd922. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae36477d-0dc0-40f2-a4ad-0fc437fa9d03.json and https://artists.proofprofile.net/proofs/artist/ae36477d-0dc0-40f2-a4ad-0fc437fa9d03.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 0x6167d196e7b2fc5d751f34c48fedc692c61cd7c836b205eccbad5cb6b031c8db. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:09:25Z), 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/FR0Q11800874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b08ef74c6da2eda001b3c37514987db3efec2e677fd701f5cc0fe4f68abdff. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/FR0Q12001148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c7b7762ff9fc84c39f83437f1d161dc341b245f686911c5e337a33d35404b3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:09:01Z), 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/FR0Q12001149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840923f9f51afc5262a9bba0b339af63b964384a3bf8b6087f803fad46f1d657. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CHA832372901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840923f9f51afc5262a9bba0b339af63b964384a3bf8b6087f803fad46f1d657. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CHA832372901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d48a6307cfc4ff03e12d8e45270d561d47fd223b65a34d706b3d67bbbb92ec1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CHA832372902.