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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bb9ff0181d4d90f705c2fe5f614fa6b9a154f37bc73abe2f3a56920bfe2165. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd72f18b-52a6-4411-97b7-997ceba1b262.json and https://artists.proofprofile.net/proofs/artist/cd72f18b-52a6-4411-97b7-997ceba1b262.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Johann Hermann Schein : Psalmen Davids, sampt etlichen Moteten und dem Te Deum
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b0a89e4885fb280d64f2926cd8918ad092b9af523cae2c9f6dbd40353afa9d. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE472400162 — a six-check JSON result.
Weihnachtshistorie, SWV 435: II. Es begab sich aber zu derselbigen Zeit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70764d347e5fdc990b4e7fec92d4760e3f5db006cc0ae9da787f571fbf10b7de. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE472400163 — a six-check JSON result.
Weihnachtshistorie, SWV 435: V. Intermedium 2 - Die Menge der Engel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04131215d10bec51f9a9b044d08bd933291d575c64a2741e1f5f46914a9f539b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE472400166 — a six-check JSON result.
Weihnachtshistorie, SWV 435: VIII. Und sie kamen eilend
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b2c40e79534647ceec5c5b289b62f1ab8e255ca1b8bd0381153b8b13273db3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE472400169 — a six-check JSON result.
Weihnachtshistorie, SWV 435: XII. Da berief Herodes die Weisen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa7bd1b3f7d5dc9edd6e5b8c541bc57256023b35f6dc3d48b856af404dba6e2. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE472400173 — a six-check JSON result.
Weihnachtshistorie, SWV 435: XV. Intermedium 7 - Der Engel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3dfffc1e2320265160e0085a1e49a7ad64e71e2453930059fd0f0837566d8d6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE472400176 — a six-check JSON result.
Weihnachtshistorie, SWV 435: XVI. Und er stund auf und nahm das Kindlein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0144150cc3831b9d7eb6ea8e785af34e4e786969a635769a1fbeead278911c7. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE472400177 — a six-check JSON result.
Weihnachtshistorie, SWV 435: XIX. Beschluss der Geburt unseres Herrn und Seligmachers Jesu Christi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6778c06772a01298af76cdaf60d0f7f03ee23bf71dff84cff16351fc5edf972d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEE472400180 — a six-check JSON result.