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 0x5ac3cc8972de86300c5627e2996c7c4528e9c26572d3ce4f42e65e2aa6ed8329. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae345b1a-18dd-4558-97d7-2982d5729cb3.json and https://artists.proofprofile.net/proofs/artist/ae345b1a-18dd-4558-97d7-2982d5729cb3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Concerto Grosso in B-Flat Major, HWV 312: I. Allegro
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 0xe488f2be4b99f18aecaf7fb725f3286684eb20ef38f7198d409b94ae4658873b. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/GBAJX9038601.
Concerto Grosso in B-Flat Major, HWV 312: III. Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbc1761e5098304ab0dc047be012175f728db9e1f068c57b31549704852335d6. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:36:46Z), 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/GBAJX9038603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0873da573ecb486c2663bcff97501c878e0096c9e682f639141aa2534b0521. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBAJX9038619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8983109582e114c8b8fa258dfcb6c61fffe81a6f87befbc6e44972ff360e9f2d. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/GBAJX9038620.
Mendelssohn, Chopin, Borodin & Schubert: Romantic Guitar Quartets