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 0x6e24febfd5158f80d56e6035df15e1bc7db31525b2794f58431b113b2af4f9f4. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d45a3193-7b70-4ad6-8845-14a823d3633e.json and https://artists.proofprofile.net/proofs/artist/d45a3193-7b70-4ad6-8845-14a823d3633e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Johannes-Passion, BWV 245 / Part Two: No. 16 "Da führeten sie Jesum"
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 0x0b6177f7e30aae73ddce246ddd85dab345b47fe227c8e3fb676c32ecc915bc8a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN962134316.
Johannes-Passion, BWV 245 / Part Two: No. 18 "Da sprach Pilatus zu ihm"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69ba502c730b999ffb482b9ee270095f55b149fb11373187876cc7a113fcdc2. 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/DEN962134318.
Johannes-Passion, BWV 245 / Part Two: No. 19 "Betrachte, meine Seele"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaad2826202614ee158c9cec2c9f8452f9912575144de03897b6191093a4ed5f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEN962134319.
Johannes-Passion, BWV 245 / Part Two: No. 21 "Und die Kriegsknechte flochten eine Krone von Dornen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e26abeed74d66bf38cc70288911f5ea20f4fe719c915fe281ddd3deced78c76. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/DEN962134321.
Johannes-Passion, BWV 245 / Part Two: No. 24 "Eilt, ihr angefochtnen Seelen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697ff28c7eee61086a2b057f7207a8b9cd8b775be06acc691dc0fc46b443bc9c. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DEN962134324.
Johannes-Passion, BWV 245 / Part Two: No. 25 "Allda kreuzigten sie ihn"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9933f5f92379f7d993e89f4d25891eac56b7ac52d557fd8f8d709665cc446fc8. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/DEN962134325.
Johannes-Passion, BWV 245 / Part Two: No. 32 "Mein teurer Heiland, lass dich fragen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac600fa99ddf60ab5070f8dedca77d77e4fd4a95545a9b718e6bb90d52a0bab3. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN962134332.
Johannes-Passion, BWV 245 / Part Two: No. 23 "Die Jüden aber schrieen und sprachen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f678876008f6c2b28c950b1a5873cdc1b7ca18075a372b2acf4dbebb189d5e. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEN962134323.
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
St. Matthew Passion, BWV 244, Pt. 1: Part I: Recitative: Petrus aber antwortete (Petrus, Evangelist, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ccfc543d348605df2db8eb0b4635bcde6d10fbbaf187b214997191ace1725a. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/GBHNG1700016.
St. Matthew Passion, BWV 244, Pt. 2: Part II: Recitative and Chorus: Petrus aber saß draußen im Palast (Evangelist, Petrus, Ancilla, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca51aaaeacdc85317ac6803fc3e9b320c5fa597e6037b7a783ea373ff456cd1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBHNG1700038.
St. Matthew Passion, BWV 244, Pt. 2: Part II: Aria: Gebt mir meinen Jesum wieder (Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e72ba02449fd96cbc1ce2719bb8db2a047b5f103fac2a136785cf4e7e49a55. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBHNG1700042.