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 0x6131845b70b39b90b77e3e8684aece6096b7666a2c8052486924e0f7896f6a07. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9c88dfa4-5d57-4322-9a5f-ca6f1b800fa3.json and https://artists.proofprofile.net/proofs/artist/9c88dfa4-5d57-4322-9a5f-ca6f1b800fa3.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 0x59e52d400297f8ff7df894c8447295c1b6448b06ace81c35dcdba74af10f4226. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/INS180905414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb821c1aef39b752425ff761736aabc4500134d112c81447bf810569789cbe2b. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:13:48Z), 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/INS180905415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3749179f71617d5be76247a7458cc5e9b86c8a25a1d044558c33ee8ffcc173a9. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:10:41Z), 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/INS181006703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd469fc7feb1a201dde79a35985317d0a7488af47dbb4612586c8a7843a0a3ff. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/INS181006704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7342dddc4f2d01e25816b35bd4681ac8e7336c4b51bf67946fc5c6e456ada49. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/INS181006705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7926ca505756a8caf8be8e02b780fb093517602bd5a893455122d05eafd506. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/INS181006706.