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 0x46b3f51ef5ce7dc5c87b2b87101257fb8d0c64d4e348038672cb4a699d460bc2. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2a8c058-e706-46c0-9474-70c5f669ccca.json and https://artists.proofprofile.net/proofs/artist/f2a8c058-e706-46c0-9474-70c5f669ccca.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 0x5f623b41f9f9aed86c8c4cf8a364afe3c75d3467e7376cdf21cbd5a6d7aa0280. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZNJV2387351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed927874bdd9d51ba2f8c9ba412f76bc74a6a82e5fef2a6d198e6831d3bb580c. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:22:28Z), 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/QZNJV2387354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc176b50c2c7ca648aacca73f6c4914d474cc147fb230da466b641bcfadab31. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNJX2304096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c49c1d244ac8bbb73c5ff539bee896f8b8a5c07ee8beebdfa8d9b1f7dc7352. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:52:56Z), 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/QZNJX2304098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305b986ce79a008d2228d9800df464346822dc4b102685c4fac39e2f4fa26685. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:35:03Z), 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/QZNJX2304101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda44f6a4da73b6ca81071ee96368b97b071df30e71a1058222e2867f1b51c1a7. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/RUAGT2585904.