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 0x7426ac1d56008f7354ccd88f255e95cda5c969a85bea92b29d3e3890973f5f9b. 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/26f72b6d-c150-4555-a85e-28abdc48c1fa.json and https://artists.proofprofile.net/proofs/artist/26f72b6d-c150-4555-a85e-28abdc48c1fa.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 0xec18991b18a5fd49289d05bf7d0ead31c050e58861b1d8b4bbbd1d1bc82a97f3. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:42:46Z), 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/QZ9JZ1777864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42abfb4e2321fa25d599d7b2b1c3642f81b3934b85559ff7573ebbd9573e6136. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZ9JZ1777867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9e008505e8b4d4ac6db91f1f9f447cce4b34f72dd8f5ee3e59434553dd4dd7. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCAFQ2131166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9acfea0ea2f51f24e768c6717f25141b9e358f3a2b99b9d05fabf41f2a8616a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAFQ2131167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb28852c85ad85ba5737fffaed3a4a3f8d679f7a8ae4e5eced87092e1d54526. 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/TCAIS2447361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233c1880ebbcae32f1a35c4c7e2e69c76d9ad2d8abf07e73e5efa0d838db2710. 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/TCAIT2447518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7ce2da3af587bf730371eca8b7e36e4c6b9a2f7ba46984000c78dced9e3a21. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T02:09:10Z), 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/TCAIS2447558.