{"copyright_id":"0xd24d3a98f3575ff366bff9b802843b08b5aab1a353d8ecfa918150ad278c137a","name":"Soloist of the Wiener Sangerknaben","registered_at":"2026-06-21T12:17:21Z","symbol":"NIM1920818","token_address":"0xf3c1fa8ebc53d533d9ca493facb46fe1d97bf3d6","type":"artist","uuid":"efab1e3f-bab4-4840-a2c1-e8cb1f9a669a"}
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 0xd24d3a98f3575ff366bff9b802843b08b5aab1a353d8ecfa918150ad278c137a. 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/efab1e3f-bab4-4840-a2c1-e8cb1f9a669a.json and https://artists.proofprofile.net/proofs/artist/efab1e3f-bab4-4840-a2c1-e8cb1f9a669a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bach, JS: Christ lag in Todes Banden, BWV 4: No. 3, Duett. "Den Tod niemand zwingen kunnt"
Bach: Sacred Cantatas, BWV 1 - 14 & 16 - 19
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 0x2e02fc7fd32b4615d986db96042e51366b13d6b872fed0658fc279a3d54ab3fb. 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/DEA807102603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e02fc7fd32b4615d986db96042e51366b13d6b872fed0658fc279a3d54ab3fb. 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/DEA807102603.
Bach, JS: Christ lag in Todes Banden, BWV 4: No. 7, Duett. "So feiern wir das hohe Fest"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3436461d1875fcaa8477806807063093eb4a8432aae28edc57cd25fdcdeb25a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEA807102607.
Bach, JS: Wo soll ich fliehen hin, BWV 5: No. 6, Rezitativ. "Ich bin ja nur das kleinste Teil der Welt"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e299c4fd3d36b04827ea3ea22abda5f6d45f0a081f44e2728e6c3212a11911e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEA807102706.
Bach, JS: Bleib bei uns, denn es will Abend werden, BWV 6: No. 3, Choral. "Ach bleib bei uns, Herr Jesu Christ"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200657a6765f4a984443eb437514e1571b91fc1202a527fd28af81b0cab11d13. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEA807102803.
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