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 0x20b2e3cd0842f23207f18057fe0b4bc48faaf6fd878f0c2ed61dc62f0bdc4d1a. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aa5ad993-04cd-442a-8e69-f12d951bf3b6.json and https://artists.proofprofile.net/proofs/artist/aa5ad993-04cd-442a-8e69-f12d951bf3b6.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 0x06a41ef5c823d57673865246e4530897e9b8cddc51ecfa0b96f0c09ca6c63e5e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:40:59Z), 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/TCAGA2214574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dce0da3d628665d515b89e80bc4e287c587820f04c88a9c20fa4a559a6839e2. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/CACWV2511483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117b5cc317bb116fa5134066191314d441406fd250c021eb051c3f34cfc33ecd. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:35:56Z), 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/CACWV2511488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d38e0bd5c23c2366d175db86f772c20ddc2ab04636a382cfd8a4fa67a45e74. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:22:05Z), 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/CACWV2511489.