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 0x9c7e3c29d9cda929feb2d027208e6ce15f549118396352dff5625a9df9320afc. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f756dbf-3fae-4485-ac24-fe009e88d16e.json and https://artists.proofprofile.net/proofs/artist/6f756dbf-3fae-4485-ac24-fe009e88d16e.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 0xdce2bf65324afc3c90c58858b65741cc626bc11e83afc15446a22c25c3a14f38. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB1857880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132b3bb68c677ddc7a06c8c5b39b439a2e8d9dc9421c653f38c5c23fde9f3601. 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/QZ5AB1857881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83332e7d8afc42512ec0021d54224da1ec1bf01e18c641b49561aa90fe3196e4. 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/QZ5AB1857884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa723c0c4e3a3ba2e48bf908fea80c6b5d84ecc486afeb23b41f8efc69504b9af. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZ5AB1857889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee49a01a050019ca9468b0b465a57272da50b55716190e8db249beefb9568a8. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:05:48Z), 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/QZ5AB1857890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1acaeeba39c56a33cdf5a04a7326577f5522217452a18dcd777b8666e04ca57. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/USHM21550984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2933007b93f5fd5390091c0f3769c786f0989abc16303586cec7b038037963a5. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USCGJ1781714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2a7ec8de0ad447dabd4e9eaaccd9bc3d69e4e0c0cad7d7d99a6a66df295844. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USHM81837162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043c0b68e829e662f23231739af01c74c7a13a9f8ec569d88249715607a735de. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCLYY2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a945307af20df816715829943bebd62cfe0a3389cf206a84f3d60d0a9feca19. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCUGR2400001.