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 0x3b5792e7b449a3eb91e1343b6d87254a3a2f22f1dc3970784aa0617b697caba5. Chain 2 (Bitcoin): anchored in block 953614 (2026-06-14T08:40:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/175826d8-7a37-424d-9273-977af2662ff2.json and https://artists.proofprofile.net/proofs/artist/175826d8-7a37-424d-9273-977af2662ff2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
St. Matthew Passion, BWV 244: No. 1 Chor mit Choral: Kommt, ihr Tochter, 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 0x587b4b173cc10070518803dd25471fc8c01eb491febe52bcb0fedbc17ee4d188. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKI199279901.
St. Matthew Passion, BWV 244: No. 2 Rezitativ: Da Jesus diese Rede vollendet hatte
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa87e780de5ffb6e1865c58ac440b720defe047fb84a5195acbd8b6348edd79. 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/HKI199279902.
St. Matthew Passion, BWV 244: No. 3 Choral: Herzliebster Jesu, was hast du verbrochen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3274b204080a5dbfb2fc81fd6fb7d6702ee8911e5a0cd03937430c7e6aca23. 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/HKI199279903.
St. Matthew Passion, BWV 244: No. 4 Rezitativ und Chor: Da versammleten sich die Hohenpriester
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bcbaa86905c7ccadd43b5c37e0b674ad88debe79d47770ac5cc3c7fe5db1d3. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/HKI199279904.
St. Matthew Passion, BWV 244: No. 7 Rezitativ: Da ging hin der Zwolfen einer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127b082bf56b3b4488d52b18443a8ed1aa40dba532133cfd81041896b0a2df05. 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/HKI199279907.
St. Matthew Passion, BWV 244: No. 10 Choral: Ich bin's, ich sollte bussen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9122ad75d246eada2bb1db610755b5875e5e8c461613bc5f2277c2b3a3c71388. 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/HKI199279910.
St. Matthew Passion, BWV 244: No. 15 Choral: Erkenne mich, mein Huter
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fa84f263ad50725f43a482a627dca5f98c12ef8d6a673705165ee3430d3ce6. 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/HKI199279915.
St. Matthew Passion, BWV 244: No. 16 Rezitativ: Petrus aber antwortete und sprach zu ihm
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa578d951c890342d843926791efbddb86dd4c7cb25b919a61598e4479d1f2e64. 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/HKI199279916.
St. Matthew Passion, BWV 244: No. 17 Choral: Ich will hier bei dir stehen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59b1160248fa1b2fb18d3970f3fb4361f84c17be4a23ec83eefe4691fbc4d31d. 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/HKI199279917.
St. Matthew Passion, BWV 244: No. 5 Rezitativ (Alt): Du lieber Heiland du
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c0e438f5305e03c71a60c79f998b8b55ef9ab20d0f07d6a144cefff20dff9f5. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/HKI199279905.
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: No. 6 Arie (Alt): Buss' und Reu'
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4fbcb129f3cfd546b3397d70b2f63f11f9aab41ad3966fe027586f0d695f4a5. 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/HKI199279906.
St. Matthew Passion, BWV 244: No. 8 Arie (Sopran): Blute nur, du liebes Herz!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df887404296bb192d251723a1f861f2305115a443e602e4e5821ec91428d150. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/HKI199279908.
St. Matthew Passion, BWV 244: No. 9 Rezitativ und Chor: Aber am ersten Tage der sussen Brot
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf112593149603b923861f6f71fe1a84abbb6b7b11e7438afe2eb2a5ab33411fe. 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/HKI199279909.
St. Matthew Passion, BWV 244: No. 11 Rezitativ: Er antwortete und sprach
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fba4e34d191868e6cdc5b3f8181e382d20d7cb62bdb1133ddf3eff442f788c. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/HKI199279911.
St. Matthew Passion, BWV 244: No. 12 Rezitativ (Sopran): Wiewohl mein Herz in Tranen schwimmt
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b63feab2a10035e19f9891710ce4364c44e3600a9bb6b263aeaf359b0658fa. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI199279912.
St. Matthew Passion, BWV 244: No. 13 Arie (Sopran): Ich will dir mein Herze schenken
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46baf8bc6b83abce357eb7c490714ec5afb988aac586eca5d5558be9dc095486. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKI199279913.
St. Matthew Passion, BWV 244: No. 14 Rezitativ: Und da sie den Lobgesang gesprochen hatten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e9b2eada91eefd0c235dc62be16b7d892c069bfd2d970ac6393ef1cce3e0d4. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/HKI199279914.
St. Matthew Passion, BWV 244: No. 18 Rezitativ: Da kam Jesus mit ihnen zu einem Hofe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac05c6e4b807ee40603a6f9794f758f345e2d64dfa64852085256d127d15b65f. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/HKI199279918.
St. Matthew Passion, BWV 244: No. 19 Rezitativ (Tenor) mit Choral: O Schmerz!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb720180fe376abb90833436d3203b87206970a2aadd7e0a4baf2f3a2ab9fcf39. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/HKI199279919.
St. Matthew Passion, BWV 244: No. 20 Arie (Tenor) mit Chor: Ich will bei meinem Jesu wachen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf5a36f8d400ddc499a2d3a81573c115dfc15845e81bee3b2be71ade06ccbab. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/HKI199279920.