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 0x042790644a793eb0e8e98bc7dd98e7b18204ed219f62aad075d34b7c8de89a41. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac2aba31-5809-4057-b631-205f95e11f92.json and https://artists.proofprofile.net/proofs/artist/ac2aba31-5809-4057-b631-205f95e11f92.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach, JS: Matthäus-Passion, BWV 244, Pt. 1: No. 7, Rezitativ. "Da ging hin der Zwölfen einer"
Theo Altmeyer/Franz Crass/Teresa Zylis-Gara/Julia Hamari/Nicolai Gedda/Hermann Prey/Hans Sotin/Süddeutscher Madrigalchor/Consortium Musicum/Wolfgang Gönnenwein
Bach: Matthäus-Passion BWV 244 [St. Matthew Passion]
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 0xf43e0689253fd5f6ae161c0612c28364171e20e56694cf9d5abc133b5bb1dfe0. 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/DEA340702448.
St. Matthew Passion, BWV 244, Pt. 1: No. 11, Rezitativ: Da Ging Hin Der Zwölfen Einer (Evangelist - Judas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43e0689253fd5f6ae161c0612c28364171e20e56694cf9d5abc133b5bb1dfe0. 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/DEA340702448.