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 0x67e6d480c183e6febfb1b48a1720a940916738ae8c81700fccf6eb87cb1a8f7e. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eb84db02-032f-4a7e-8bf1-70cc5cc1ca6b.json and https://artists.proofprofile.net/proofs/artist/eb84db02-032f-4a7e-8bf1-70cc5cc1ca6b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Osterdialog, SWV 443 "Weib, was weinest du"
Schütz: Complete Recording, Vol. 20 — Psalmen & Friedensmusiken
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 0x55210405863eba6b3a8b8df8f53d6033122f8e558687fc8bf3684cb970b37a05. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEB111903708.
Symphoniae Sacrae III, Op. 12: No. 4, Mein Sohn, warum hast du uns das getan, SWV 401
Schütz: Symphoniae Sacrae III, Op. 12 (Complete Recording Vol. 12)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36650339ef224c4e50aee32b9bf634092e83c46d5a9b31cc82ddb946a7fe20e5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEB111504104.