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 0x01e6dae88e5384cdd3fc33f0090c2a894769721088202c05fa61e0ff31a8b1eb. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e70238a4-4df4-4641-afc7-bf39e7a7db91.json and https://artists.proofprofile.net/proofs/artist/e70238a4-4df4-4641-afc7-bf39e7a7db91.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 0xc86c2c8d115ca575b1ca6b2d5f94364fbf865a017e68c735fc5dc0fbd6b77290. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:48:45Z), 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/UKXN22363784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374775a4dd5342f3c84a809df188f1ed898fae33ede0e495f58fc1c7642edd3f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/UKXN22446517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdd2a533349a6743e7bcb35e9c8dfcf8cd9097a50754e2423e2f504a9634def5. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:48Z), 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/GX53U2427954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c566a785d55edab732a84fe6d93337e0849dbae3f57370a11b9d5b7815e3da3. 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/UKXN22522108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdb991276826dffabb809a13cca37b0e50eda520469dceeb8bfe8b53771c168. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:22:39Z), 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/GXH2J2506649.