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 0x13b84a625a2ab36feeec0410d50d8c5356af95f202d7cf33a766c59de357e7c4. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2d58747-2ce8-4fd8-bd5d-1a23a89acb41.json and https://artists.proofprofile.net/proofs/artist/e2d58747-2ce8-4fd8-bd5d-1a23a89acb41.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 0xb11ed5cf15f4cade7a25b2a2222c4db09121ad8481b8d5f25b1a15c202827654. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZNWZ2288017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d73b5424d630058f7bcc8d5b916f91a0c32af4ca8dbf6a3d1a577ed16f68cbe. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:23Z), 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/QZNWZ2288018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d7209f0e7ace9b9d8816a697008e98f5b38165a9170e1da10676ec69cc3d5a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNWZ2288019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3fe648635aeb471bd4bb642e9444743849f4dc3cbfb742a7a4c9700474411d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:10:38Z), 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/QZNWZ2288020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea787058e18b97e0e571ba1c8b3a08a65c85e4ac81a4dd32a4fd467b22cc0632. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZFZ42438079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a43891d62c495cf63f3b32d5fd9ff923d602d13a6da5531a81b8f689860464. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:09:21Z), 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/QZFZ42438080.