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 0x10735628055fac939ecdbcd9507345ca297b160a497d3cef6c28660cd5a245d5. 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/9c347ea8-2aa4-4c7f-b31b-3b121439c82e.json and https://artists.proofprofile.net/proofs/artist/9c347ea8-2aa4-4c7f-b31b-3b121439c82e.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 0x12605a79a45385c5b8ace2636b8987e2f753c971873e5b18a8c014b27e0309ef. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6Q1965715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2320e786804655841ad04cc481801849dac455b238a8c7dac660de6494c031. 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/QZK6Q1965717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70c32ae3abb43a8e06238cd04f7d277bf6b93095031157192ba3149accca552. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:29:30Z), 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/QZK6Q1967457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaad8cd54413adc461fc602c98b6f9f7c5856f6560b5997725eda8dda90d9bf5. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:22:32Z), 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/QZK6Q1931551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa7816f7811d3f1f33b6963fcb7cd0a870e7577f8996889e144888cb19fc1ac. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T19:05:28Z), 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/QZWV32342773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcb4cc4652ddc54f79d1f035a5321437778bd1ff1d642a682f43abc0c4835e8. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZZ8A2505487.