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 0x1a43611d15c4e3807b077adb7a33eca66fdaa7a9289ed3642c42be40b1b943d0. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa29bafc-1616-425f-a88a-f63fa2ff5177.json and https://artists.proofprofile.net/proofs/artist/fa29bafc-1616-425f-a88a-f63fa2ff5177.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
"Der Herr denket an uns" BWV 196: Coro: "Der Herr denket an uns"
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 0x0c2b40f46d0cf712f27cc1d012650fc94bf2a322b9e2013dfc0f2f683ed9442d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLK170200077.
"Der Herr denket an uns" BWV 196: Coro: "Ihr seid die Gesegneten des Herrn"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b9d8e48b9bb54e4a7f93ef4ee2b381f7daa9da6af469ac8f2fc14941ec348b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLK170200080.
"Nach dir, Herr, verlanget mich" BWV 150: Coro: "Nach dir, Herr, verlanget mich"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12da66efd97460dd10c29587f8c4aa9e6d4be3cb865fbc6d09ab1b6368d135f7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLK170200089.
"Nach dir, Herr, verlanget mich" BWV 150: Coro: "Leite mich in deiner Wahrheit"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045ccda95444fab7b56d59026411b645e5cf42bf9ecf23616a6527105b09766c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLK170200091.
"Nach dir, Herr, verlanget mich" BWV 150: Coro: "Meine Augen sehen stets zu dem Herrn"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x855e2252dc64c0b88cc10ec484441ef258db871e7485134f1ffefc43fbd15746. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLK170200093.
"Nach dir, Herr, verlanget mich" BWV 150: Coro: "Meine Tage in dem Leide"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a55aae5627d15238b1204c9445c81e9d5bece0df15be5fa4c51ef5db74ecf8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLK170200094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daa9ee714ff7afe6246fd3931eb2af58a2e92095cebe560d667e21015788f9e. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USA560676171.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch