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 0xc01da1a82ebe339d61f4e0ab1b3d2b08510216d71157defcda7a40f2877dece6. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64fe955d-169a-49a1-8421-d58d7603f211.json and https://artists.proofprofile.net/proofs/artist/64fe955d-169a-49a1-8421-d58d7603f211.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Organ Recital: Scholze, Hansjurgen – Clerambault, L.N. / Pachelbel, J. / Mozart, W.A. / Bach, J,S.
Die Orgeln von Gottfried Silbermann in Gromehlen, Crostau, Dittersbach und Dresden, Katholische Hofkirche, Vol. 8
Haydn: Mass in B-Flat Major, Hob. XXII:10 "Heiligmesse": Gloria
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 0x1e4c6b74ab83b2a205b3baaf928263b61b019b8b90c5d68c2e60f404b25a7a5e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBAYC8602049.