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 0x12c9fb95c6a9e3fab2e5381d30c9c640508c92731774f2084821821e4a58f1dc. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89690b94-fb05-4932-81ac-0b17735c52bd.json and https://artists.proofprofile.net/proofs/artist/89690b94-fb05-4932-81ac-0b17735c52bd.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 0x26bce2c1e0cd2b7327e271b8ebbafd06f7c985d3376ee24410368a981fcf50e9. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/TWP011623201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35223c93ddc4489f85ea68cb7093b068a56230eff6c25218ab0336bf12fbba6. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:29:56Z), 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/TWP011623203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a0107ec6a6bf420036eeade52912d12c258c760464db4559151e343e54f46c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:51:02Z), 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/TCAFA2068878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12a8dd73d8df223c5c90d70b2fb9e49acd566dead0752114ac4c6290e816b64. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCAFA2068884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2abeb50de54e3cc800f4427f213ea24196045cc2172b0a963894a486357383. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:08:23Z), 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/USCGJ2488229.