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 0x7c884344c3798b2d92bbbcc38c999adcc5bb0322dad131d794bd8ef0e9799b6c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ba15864d-cee3-4001-a603-bb07577c0b8b.json and https://artists.proofprofile.net/proofs/artist/ba15864d-cee3-4001-a603-bb07577c0b8b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
St Mark Passion: 38. Recitative (Evangelist): Pilatus aber gedachte
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 0x997fbbd8becdb754e9433ae6b0128714f67dc030d477b6689884a9a57f16c192. 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/GBUM70803052.
St Mark Passion: 2. Recitative (Evangelist & Jesus): Und da sie den Lobgesang gesprochen hatten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278e49ed2ab66d33c2f507f898650de274b9f6fcf2521e6a829d76bd7a8b47b8. 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/GBUM70803005.
St Mark Passion: 3. Chorale: Wach auf, O Mensch
Choir of Gonville & Caius College, Cambridge
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04a174e9cbc42ed528bc9bd353f4f160a08fa694084fb358485d9841d555c57. 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/GBUM70803006.
St Mark Passion: 41. Chorale: Man hat dich sehr hart verhohnet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a04ad0b97d878f741c93dc7d3fadd3a845b13960fe0c7a5e2402d612b6c5b97. 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/GBUM70803055.
St Mark Passion: 4. Recitative (Evangelist, Peter & Jesus): Petrus aber saget zu ihm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbca7b104da00f302b6be44a41a3db018614a1bd3b8eb49c21dbb9472d7582db. 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/GBUM70803007.
St Mark Passion: 5. Chorale: Ich, ich und meine Sunden
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87357a7a37d12ae061fe79a17c9741baf4493219e8488b37ca53ce21ad6c6b39. 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/GBUM70803008.
St Mark Passion: 45. Chorus: Pfui dich, wie fein zerbrichst du den Tempel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bccfa99585754be4af2251baad9bb8069a14b1f0e09d0521069f7e1af048342. 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/GBUM70803059.
St Mark Passion: 10. Recitative (Evangelist & Jesus): Und kam und fand sie schlafend
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1794c4c2c60449d0af491c13f0711302112efb278eb16956363e97ecb074a04f. 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/GBUM70803024.
St Mark Passion: 12. Recitative (Evangelist & Jesus): Und alsbad, da er noch redet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12eddc42e085120e9357270ae8c84cbeefcf5ff90b147626455672824703d44. 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/GBUM70803026.
St Mark Passion: 14. Recitative (Evangelist & Jesus): Die aber legten ihre Hande an ihn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d53daf561ec7fb92e1bef6e7870a2aef484686d2a18e49d3d8fad616a9f4a94. 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/GBUM70803028.
St Mark Passion: 16. Recitative (Evangelist): Und die Junge verliessen ihn alle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38310e9f0ccac00001c3f3b0402480a6e118067cf545666962b702b616155582. 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/GBUM70803030.
St Mark Passion: 19. Recitative (Evangelist): Und sie fuhreten Jesum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dfed91abab1d91b999fcce037af535bf22f1e6360880a74fdccf30ddc83cc37. 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/GBUM70803033.
St Mark Passion: 22. Chorale: Was Menschenkraft und Witz anfaht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ed18db91c965bc793eabc58becad0e232994486c46168f8ddf7fa12073ab3e. 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/GBUM70803036.
St Mark Passion: 24. Chorale: Befiehl du deine Wege
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e7d47d1b9ac91bfa86cb2ed12331778c294b92e266d048f656c15f8cb63bdc. 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/GBUM70803038.
St Mark Passion: 25. Recitative (Evangelist, High Priest & Jesus): Da fraget ihn der Hohepriester
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c116d02e33a5a82d1d64f384f7f0b0a1470f5e854db6dec82fa1f754a69e3a5. 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/GBUM70803039.
St Mark Passion: 28. Chorale: Du edles Angesichte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296b35ca23bbbd5fdb3cc37066086d5984e3e2a4413f7ad4ad21b88d3586afa4. 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/GBUM70803042.
St Mark Passion: 29. Recitative (Evangelist, Maid & Peter): Und Petrus war da nieder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7e4332831851550a9c7407009d1885a29b1499afe3501275e1ac925c3ddfeb. 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/GBUM70803043.
St Mark Passion: 37. Aria (soprano): Angenehmes Mord-Geschrei!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488edceee1b44860ec92a200bdacea1a4244a4ca7ac443a369c3186fe7037625. 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/GBUM70803051.
St Mark Passion: 13. Aria (alto): Falsche Welt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65205b311ae72c7027f5435253d16cb2c8c969ea4ee1f965af23b1e3c94f7f26. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBUM70803027.
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 Mark Passion: 23. Recitative (Evangelist & High Priest): Und der Hohepriester stund auf
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f91d4b68e8afa4aba2792961c643f0639cc5cbe23cdcfd761ffca054097c34d. 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/GBUM70803037.