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 0xbb58766ec500b6c03b4894ffa7d8da63551aada6b0d3abf5c08e6f47a1117e40. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58ca58df-a9b3-4df3-b9b5-8029cc0c4322.json and https://artists.proofprofile.net/proofs/artist/58ca58df-a9b3-4df3-b9b5-8029cc0c4322.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 0x7ae8955cb5936fd7d76cc99812affe6b299cb0581cfcd21740cacfa2b5756049. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:18:48Z), 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/CALVP2462338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082ea3b381e8c160adbff15e1380ec74129a1fb712991a982ea1a142fa776093. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CALVP2462347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68651f9f0dd3de3e5f37ac907fd2b3a5eaba4bc93a494f036482dd3fb8c11412. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:44:58Z), 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/CALVP2462353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbc7277d7693b3dc6f0dec914a29aa7734f4726995568dc8ef4bd89a98a2ff6. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:07:06Z), 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/CALVP2462360.