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 0x53ade60378047e9f46511e5d6d56daf8ed95f30aeb7f6badd3e530c07adf9455. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3c56063d-d0d1-4440-a887-32f62cabdde1.json and https://artists.proofprofile.net/proofs/artist/3c56063d-d0d1-4440-a887-32f62cabdde1.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 0xd84997e4f32760e525fb8b063521e1a2f62ae08eaf15f7ab334ff79a19e3b587. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:24:18Z), 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/TCAEB1987921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5719f749686794c060deae16204194587bd936d5575f0609728e91be3de272b5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAEY2087701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae59e0e960526a7a5d5f0813588e5ee80b65f7ab23e923eb8e8141d405461ba0. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:29:36Z), 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/TCAHM2337434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1aba9e083d156d07e80bef56aa30d639a42aadd2d3a6ca7c74380f9015d40f3. 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/TCAHR2300253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb9f56bc1e5bf63ddd3aa911052d5058da7c6f6d596a342a2964e2fdee46aa0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAEJ1908532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d6f667d5f8b43f9a2630bf0d7b808fb1451b0df8cb6d397b9f9f9f8e419a38d. 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/TCAEH1980276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f71d2971290b53258dfb9168b76ebac329e9db479c1ec68a2783a694dd7cb61. 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/TCAEC1929272.