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 0x75525c959015972e16b3868d68d083a06833f49376719383ce340397e2142b00. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42d4262b-58c3-439c-a887-4b9c1de57821.json and https://artists.proofprofile.net/proofs/artist/42d4262b-58c3-439c-a887-4b9c1de57821.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Kantate / Cantata "O ewiges Feuer, o Ursprung der Liebe" (BWV 34): Recitativo: Erwählt sich Gott die heilgen Hütten
Johann Sebastian Bach: Cantatas / Kantaten BWV 34, BWV 93, BWV 100
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 0xcd574086aa7b1cf256ee2cf361db0cba0c1c92314bbf7b946f8256ab95928af8. 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/DEN420003004.
Kantate / Cantata "Was Gott tut, das ist wohl getan" (BWV 100): Versus IV, Aria: Was Gott tut, das ist wohl getan, er ist mein Licht, mein Leben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4bc64322c79dc23658f3be157e7d4486755ba2c382df672522df7cd8692765. 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/DEN420003016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7e81b22feb6cabcec47de6b9ea7b4c85de2c30cc60636624f4d512c8746bdd. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI199701522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872721e12b387c4c1b79a09c6feff360973b889077be123c6369b477d326605b. 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/HKI199701501.
Kantate / Cantata "Wer nur den lieben Gott lässt walten" (BWV 93): Recitativo e Choral: Was helfen uns die schweren Sorgen?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d5be897c59b20d05df856027300f667a09988320e7b5c7d2cec30960e30e1a. 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/DEN420003007.
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 0x8daa2bf722d2dc694c2549eb053e67e3c9abdafb339612f52ee8007cd046c157. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/HKI199701517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd294de1408d36c6312636bb1ba9939527aa4e9f9238eaf4ff75d9280eb6c74. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/HKI199701507.