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 0xc09bcb2fb65dc094f871e382a9937846bf9c3075d9f01ed500d1a3385be7f700. Chain 2 (Bitcoin): anchored in block 954516 (2026-06-20T07:04:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a1837b1c-a37a-4464-964f-279bb1b2b7a3.json and https://artists.proofprofile.net/proofs/artist/a1837b1c-a37a-4464-964f-279bb1b2b7a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Matthäus-Passion, BWV 244 (1841 Version by Mendelssohn): Chorus with Chorale "Kommt ihr Töchter, helft mir klagen"
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 0xf2996afb351e4574b6f0a2668f1c27daf5f440fe475d8023583e099e922c5cf5. 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/BER182395301.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Evangelium. "Aber am ersten Tage"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6626f02de417f0473b553d73b98b66b646f66275000bf9dd74cc41047ce8f02. 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/BER182395309.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Evangelium. "Er antwortete und sprach"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7abbef6333e26d745b9b26b04dd82afa89c07b18ca68e33baee712523acde93d. 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/BER182395311.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Evangelium. "Petrus aber antwortete"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69daa50f44ca821fed9e7587bacc521d33f74f2f3b00a2d6f65a1355a4db531. 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/BER182395313.
Matthäus-Passion, BWV 244 (1841 Version by Mendelssohn): Evangelium. "Da Jesus diese Rede vollendet hatte"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c516cfbd56ff1e35a40dc14936293a19a2cfbcae0b4922383e7fac1c9b005e3. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/BER182395302.
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
Matthäus-Passion, BWV 244 (1841 Version by Mendelssohn): Chorale. "Herzliebster Jesu"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41202e407e9f50a8fee2af795b8d243edbd66fbdc735a737e3bf9e3de7648f64. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BER182395303.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Evangelium. "Da versammelten sich die Hohenpriester"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33d68625872df709b31562d55aa799b331d925b631c7dbe52031bd50d4c5bab. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/BER182395304.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Recitative. "Du lieber Heiland du"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe191733c32507da0a030e5e6239664d3910ed40bf706ba1a77996d13721ab3d5. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BER182395305.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Aria. "Buß und Reu"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8769e19bb6873329a89366a45c79ebba953e80e419c2e56d35c8522b561fd5. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BER182395306.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Aria. "Blute nur"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f61a6a029d560cb3146ecc8155531450832bc516b1c5c2e5e01a7695213c2b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BER182395308.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Chorale. "Erkenne mich, mein Hüter"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb45323c765282b92c0c9ebd754c7544dc7345794dec407b1721e879dae492c4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BER182395312.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Evangelium. " Und er kam und fand sie aber schlafend"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd84a8d618efcb75b642f4063c10d7270fc449e725be5d8b1b1f3049da24712. 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/BER182395318.
Matthäus-Passion, BWV 244 (1841 Version by Felix Mendelssohn): Duet with Chorus. "So ist mein Jesus nun gefangen" - "Laßt ihn, haltet, bindet nicht!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabb88cf9f97609ba97d9b31ff64747991fcdcda6019b2b21227550ae21a1f77. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BER182395319.