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 0xbf37532da07edc9dfed3dcf3033ac7af6f1f42254d81eeb876140f3b2df4acf8. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac395788-e664-4538-86f6-23c4fc786d61.json and https://artists.proofprofile.net/proofs/artist/ac395788-e664-4538-86f6-23c4fc786d61.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 0x056f66e18e370f7a244c20d93691f7f3e8166dfbc89f21f55d3250e15c015b2e. 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/QMFMF2364393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc43e4c7c5f0b79dffebbb243f020d0a5f1abe3b95a7f0084637ce020052e67. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:45:59Z), 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/QMFMF2364392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9748d3d38aa2d10588b675177341e0e6efc9bf9cc0b0a7a6f9762936cf353d5f. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QMFMF2364391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0056e0b6da375ffaa980eb8703ddcce7ed9f8a29a71291d516bc2188736d9d07. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:31:29Z), 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/QMFMF2364394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64c471012f1cc37df35e08357a4fb6466149a02a9ca3bb99645059a55eed3e16. 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/QMDA62433925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd640561f62ca3bdee9febb26003550c3e5f3355767ecfe9db6ad50101c8eb8e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMDA62433927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271c33b2268e642caff1a4897a046cbb3b80c08123bcc91f4c2ae7d233beec1d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QMDA62433928.