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 0x2e0f6b719120ff4b0f95a2408099543c8361f07092cef8c90a315a3cd6e7e043. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/496a01a4-c83c-4bac-acaf-dafbaa8d9f90.json and https://artists.proofprofile.net/proofs/artist/496a01a4-c83c-4bac-acaf-dafbaa8d9f90.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 0x43c188eef7337fab8f3674cb3381cad7e004f06f0cd5c677ef1f48b692b9ec57. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZAKB2173291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5935459e4eabf3d659863da211fae7fe818303b9f45c8fa9fb39f8d7d40f5085. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZVEM1834369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac8a50ac1a3138e22a09c2aedb39400a3858506ca42efe95e5d33f6a39ad887. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:37:12Z), 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/QZVEM1834371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d84ab845dc35c2ace3e52733ab144ef320f1052c02a9e197a42aea6b10332b7. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:42:41Z), 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/QZVEM1834372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77526f6ba99bdaf47d421fb7aa2d06965aaa135ffa64719ffb0d98943818aeb. 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/QZVEM1833641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d1412e6d772cea15b3b04cbb789f1fb6eeffa1c8ec63c51d181858d395c9fc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZVEM1833644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4424311e2bf2ffce4dffe0d0f8109fbd35a3b8cd32cf231510d4c2ae0f4d56b5. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZS7J2471320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x160855186f927b20d692acd81933ac3fc4ae5a657a6af9097a68da626a072ad2. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:57:32Z), 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/QZVEM1834374.