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 0xc0549684c80006cd06521d09a4d1ec9c8fa5a6dc2166db6cf2e034dc7864ca62. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da6fdb88-461e-4359-be52-9fbb8fb05265.json and https://artists.proofprofile.net/proofs/artist/da6fdb88-461e-4359-be52-9fbb8fb05265.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach: Motets, BWV 225-230 (KulturSpiegel - Eterna - Über Grenzen hinaus)
Johann Sebastian Bach: Sacred Arias - BWV 4, 59, 68, 71, 79, 111, 140, 244, 248
Christmas Oratorio, BWV 248: Part I - "Großer Herr, O Starker König"
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 0x523e6165ebf6c187b22dff4e8fd6e7355b686d4f13101e2a76b56f9fe728b594. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DES380648001.
St. Matthew Passion, BWV 244: Part I: Chorale: Ich bin's, ich sollte bussen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0621f02f7bbafe8d5c13cd076e21095a7e346bd7b31db938821c4d032b9218d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DES380648006.