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 0xaad75a14eb4fd1cb38f1fc7d7df9e945bdba1e33f2d8aefb088d802026cfd1ff. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3db24407-a647-4b4f-8ddb-f95548e74445.json and https://artists.proofprofile.net/proofs/artist/3db24407-a647-4b4f-8ddb-f95548e74445.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
St. Matthew Passion, BWV 244: Pt. I: No. 2, Recitative. Da Jesus diese Rede vollendet hatte (Evangelist, Jesus)
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 0x8e88680a51c839fcb0a623ca7a53ad47f8b148ebb3fb693364a2c92379e077ce. 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/HKI190584402.
St. Matthew Passion, BWV 244: Pt. I: No. 5, Recitative. Du lieber Heiland du (Alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7559eea8af6facea71ac072129ddcd2cfd86c9bf063fc5493c4821de82cca636. 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/HKI190584405.
St. Matthew Passion, BWV 244: Pt. I: No. 7, Recitative. Da ging hin der Zwolfen einer (Evangelist, Judas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a54dbf4f5a014e1c3008ea109096bac6dcaa82073e63cc149bd2b1dfca6e886. 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/HKI190584407.
St. Matthew Passion, BWV 244: Pt. I: No. 8, Aria : Blute nur, du liebes Herz (Soprano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c8499710064671eb878e85c48a7d096b38f194aae99a0fe5bb19d462d96f96. 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/HKI190584408.
St. Matthew Passion, BWV 244: Pt. I: No. 11, Recitative. Er antwortete und sprach (Evangelist, Jesus, Judas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30690ebd85694c4a57d6f56c76c163a7e37700e96a08d156fc90e0ca292d34d9. 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/HKI190584411.
St. Matthew Passion, BWV 244: Pt. I: No. 1, Chorus. Kommt, ihr Tochter, helft mir klagen (Chorus, Soprano in ripieno)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f74062cf37ed5415f86ee2223a906e3983f5c1a5d0f352b595b178df1b491e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/HKI190584401.
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. I: No. 3, Chorale. Herzliebster Jesu, was hast du verbrochen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd027caa47479dee8c78d074996d521b6accd5d94121381caf35f714508a3f11f. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190584403.
St. Matthew Passion, BWV 244: Pt. I: No. 4, Recitative and Chorus. Da versammleten sich die Hohenpriester (Evangelist, Chorus, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897b6960e766f37be375054771fe6bad240df92b5a650be6871f05d1a10bcae5. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKI190584404.
Matthäuspassion, BWV 244: Aria. Buß und Reu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b6e1baa00bed7438b47b0a1d2a4c309b9e21d8df28e088255aba7681f8bec8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HKI190584406.
St. Matthew Passion, BWV 244: Pt. I: No. 9, Recitative and Chorus. Aber am ersten Tage der sussen Brot (Evangelist, Chorus, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42237b1e875d181bce6d581d5ae09f18b37481550549e28f764c0a0a6de1e385. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/HKI190584409.