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 0x306286f1cbcd9ba1a3fd059630bab6551dcbefb158b72e2ab88a972fc7afcae7. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f9b03f3-dc22-450d-b55c-2ab0f9b3937f.json and https://artists.proofprofile.net/proofs/artist/9f9b03f3-dc22-450d-b55c-2ab0f9b3937f.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 0x2fde4ffe64df739eaf91ad74d88173aade7c0e9f2788b5ccac50147735a83332. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:34:16Z), 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/AEA2M2451928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d76c2ad4f57edf1f227457ca5bb849e180edd4eaba16a67cde24ee91e014dae. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZK6F2578368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5a11949ed21cbdfbd87f2249e127f2452644a06df1843b1ee1717cbce68820. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZMEN2589301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c9468eb63cc28528bbcdabb0bc4b6a964dfdfb61021815464bbdc57d239ebb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:52:11Z), 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/QZNWV2516816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96971cccd7f9f3784fc51e63ce0071afe10f90a6b72a72bc9bfcbc106829802. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:34:03Z), 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/AEA3A2546747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851faed825eac7e6e56771967607ad556aa5344540f2cdafba431ac7e12dfcec. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AEA3A2534388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63f9a6f075ce4197986cb04027986acaf622c8e5558cf00b478326d27bceac3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:45:33Z), 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/FRX452523945.