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 0xa3cc9ed4308995398657fa2226fa7217b45b09fd0dfe9fe5700b5c65c7fabe8c. Chain 2 (Bitcoin): anchored in block 954513 (2026-06-20T06:31:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9efba5e3-1e9b-41e9-8b94-7c2e481b128f.json and https://artists.proofprofile.net/proofs/artist/9efba5e3-1e9b-41e9-8b94-7c2e481b128f.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 0x7d7bd881483c1308c53507820b2630718f7ede131ac59753d80bdd6091311a8f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/JPB752380101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6ae64ed6457efdc309b59d1b94fb5e0522bcf5599eb69b8df6592071bdff3f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:41:53Z), 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/JPB752380801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319d4aa9538bc46b2bf6cc0699f8a761f16222c643983ed515bdbfdb9cb4aa60. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:34:17Z), 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/JPB752581101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffcdebee681c9326dfae198c92c5ac19c7358e8f2fe61ad791d65d5bf48f6f8f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:07:49Z), 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/JPB752525610.