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 0x735cb36c15327a0a9f3dab8f2bc47ecf85fd15e447df1c9741f2f6ed2875c1ef. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5bb25a7e-340d-46d3-8230-7d2a6ba0913a.json and https://artists.proofprofile.net/proofs/artist/5bb25a7e-340d-46d3-8230-7d2a6ba0913a.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 0xe1079f0c4cf9cd2ea88a4eccff608690b1ffa83a8a27b8958e09f4edefaa114a. 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/MXF170710004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b7cb967714dfe2004ceb96beed65c7865b41bf91ce350cec2c75afa1962430. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/MXF170710018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb1558b4bfb3146abad2197de1a1cdec8b32b76ece3b786b9b3330d628cbfde. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:03:13Z), 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/USLZJ2486954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0d50435d0d357deb6c1023f47b91305b1e499f36f1d7c71b225913283376b8. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:24:26Z), 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/MXF171202425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9c568fceea433a48445850e44a1d890bc6ffb719fe467da573f4b08c65258e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:46:11Z), 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/MXF171202428.