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 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 0xbf29c174ec41a4e8597cbaa8e8c1fc592694e0c8643f9e4eb030adaac4386e55. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0cc2cae-2974-4e9b-9421-bad1963cda46.json and https://artists.proofprofile.net/proofs/artist/c0cc2cae-2974-4e9b-9421-bad1963cda46.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Markus Passion, BWV 247: Recitativo (Evangelista) "Und da er zu Bethanien war"
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 0xbdb17dc2e288c7849bf26affff3d1de9c4653393e2aa201a587283786a2a772e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CH4211900004.
Markus Passion, BWV 247: Recitativo (Evangelista, Jesus) "Und murreten über sie" (aus BWV 244)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8646bee5d93813f91fab046affe7ae927307d2220c7da9a4638ca9f6ef60770. 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/CH4211900007.
Markus Passion, BWV 247: Recitativo (Evangelista, Jesus) "Und er sandte seiner Jünger zween" (aus BWV 244)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97c7a738502baeb8a84c88219a65d09d3d0365b069fe61d9b8901f77f40b261. 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/CH4211900011.
Markus Passion, BWV 247: Recitativo (Evangelista, Jesus) "Er antwortete, und sprach zu ihnen" (aus BWV 244)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c50ff20cae2f0033acb45592aa344aa8fe781f90f36455d224c7f7ee86ca1bb. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/CH4211900015.
Markus Passion, BWV 247: Recitativo (Evangelista, Jesus) "Und da sie den Lobgesang gesprochen hatten" (aus BWV 244)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae55b3715bfc49dea4c0482fe6a3e842e052decad140853bbee3d8ad1cc3751. 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/CH4211900017.
Markus Passion, BWV 247: Recitativo (Evangelista, Jesus, Pierre) "Petrus aber saget zu ihm" (aus BWV 244)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9767ac2ac3c35d8d5f2088dfeb4f6b5c4ce82c0dfb42d3029fad7adfcb5afcd0. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/CH4211900019.
Markus Passion, BWV 247: Recitativo (Evangelista, Jesus) "Desselben gleichen sagten sie alle" (aus BWV 244)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7630b8c62c61deb74d1b7b35f6d4ffb9d7214778c02419b37170000d4ce226b. 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/CH4211900021.
Markus Passion, BWV 247: Recitativo (Evangelista, Jesus) "Und ging ein wenig fürbaß" (aus BWV 244)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ee44284a67d83f9553dd621c0a99754dd2e0b1d04e549e6eb92b25abb8b48b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/CH4211900023.
Markus Passion, BWV 247: Recitativo (Evangelista, Jesus) "Und kam, und fand sie schlafend" (aus BWV 244)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8433899e3d67613375fae9187acf96c945ef1e27dcfd363c462a24c4cede00. 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/CH4211900025.
Markus Passion, BWV 247: Recitativo (Evangelista, Judas) "Und alsbald, da er noch redete" (aus BWV 244)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92e5de492d97c6bdaa4d4b2fa382a15c49187a604a7ded43b9996c20b91c4134. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/CH4211900027.
Markus Passion, BWV 247: Recitativo (Evangelista, Jesus) "Die aber legten ihre Hände an ihn" (aus BWV 244)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fae551f0ad583d0b39a5f3bb464c0a0f64c2462fb371035cd6f6fedbb17c68e. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/CH4211900029.
Markus Passion, BWV 247: Recitativo (Evangelista) "Und die Jünger verliessen ihn alle, und flohen"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f53af40f6196fe9f2461f1938fb144898d5fe105b225b616901bc244632907. 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/CH4211900031.
Markus Passion, BWV 247: Recitativo (Evangelista) "Und sie führeten Jesum zu dem Hohenpriester" (aus BWV 244)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c952882e326c1939b4294a6b28b89cf1054fc19d5c53ed1362df6e859526e12. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/CH4211900034.
Markus Passion, BWV 247: Recitativo (Evangelista, Pontifex) "Und der Hohepriester stund auf unter sie" (aus BWV 244)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8248236581df43ce0145cde3fd97ed8dea45cd723a9dd8a684f6de3e43844e44. 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/CH4211900038.
Markus Passion, BWV 247: Recitativo (Evangelista, Pontifex, Jesus) "Da fragte ihn der Hohepriester abermal" (aus BWV 244)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c395f2ae4d123da9b2ae83a5dc1fc9cb63b4d3c6215ad4e2d559edab156c58. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CH4211900040.