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 0x7a0439291992cb1bae86f43ae0f13caa2f4ac8b1137e851a687aef0f967b8440. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/975fb3da-49ad-4288-ab59-2580698971af.json and https://artists.proofprofile.net/proofs/artist/975fb3da-49ad-4288-ab59-2580698971af.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 0xef6403d2b6587e904480df3ecc4f590c7af612d100d9485891e349411af72211. 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/QZWFE2429656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990e5189306555dffbe9fdc68951b4abf6e2919b4b9145e30ceb98e2bdc3b298. 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/QZZ792447112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8734d74af20bb82f2f935048af64325332a2902f041111ce1840d6048ca151c6. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZZ792447113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c3eb70b8cdedeca6b841b1cfa9ce081ec30fef3313b4f83c6cb404f95716dd. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:02:41Z), 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/QZHN82581257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17780fbe883e610f1c3e700f5587121d9915d6c292227c0604389a5550beda91. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZZ792447111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8afec6f47fa83010a175c91dfa586615b728fd5fd5b654ea2b3a7371b75dda2. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZHN82581258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c45a9ef1beb986e96428f77da3a5f59efb8a35bf2faedaa991c927a4b11034b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:37:22Z), 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/QZK6Q2532488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13f6960d2641a6b4f197200087b1844174ad5872c86cd737d1307a54dee9e02a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFW2579525.