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 0x8b38c02d28052ca41f86430a9da024c16eb727ac58f5e2de041432c4e9715e04. 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/7cf27dfc-83bc-4f8c-b31b-a634561aafbc.json and https://artists.proofprofile.net/proofs/artist/7cf27dfc-83bc-4f8c-b31b-a634561aafbc.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 0x4919fcc91ad4480b90d779b259ccb4e05026a69df331d686096f0fa62ccc3616. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/CALEQ2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404df82ba5c136054bf4544412ea81b203e5bad171810f94bd204d28e0a66038. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:11:15Z), 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/ZAD8H2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc533d6eab52daaad85f2eadfa54e68cc36c99e6c50b0454b54882bf3e37bef4e. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:23Z), 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/ZB8HG2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fec9e3ae8ce083711c3b2e9581347ea96192838ae610fbc74fec89d3e0b38fd. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZZ8B2397912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296d4a55ba344b7021ac91471e623bbaf559fe724fb735ebc234e45d7a752fc3. Chain 2 (Bitcoin): anchored in block 956809 (2026-07-20T11:53:57Z), 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/AUQ9D2407402.