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 0x00132002d850c86477ad65c3126eb7486e1d36a265e04ff6046c8ee235d91140. Chain 2 (Bitcoin): anchored in block 954141 (2026-06-17T21:14:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80343a94-17f6-4d00-b5de-43af98c70f3d.json and https://artists.proofprofile.net/proofs/artist/80343a94-17f6-4d00-b5de-43af98c70f3d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
St. Matthew Passion, BWV 244, Pt. 1: No. 7, Da ging hin der Zwölfen einer (Evangelist, Judas)
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 0x2895fe6bef147b6478d5fa3deeab356757c9ecb155109ae7fbb1ea8f9bf40e65. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SEAEB1900070.
No. 22, Der Heiland fällt vor seinem Vater nieder
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc31dde8659de66123058161afd7d5be0cf75c7f7e72facacc7be711d70937df. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/SEAEB1900220.
St. Matthew Passion, BWV 244, Pt. 2: No. 36, Und der Hohenpriester antwortete (Evangelist, High Priest, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28062fcb72db88ae9f4d15ffce97b12dc0440056eb6ee00528df32334b6d7893. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/SEAEB1900360.
St. Matthew Passion, BWV 244, Pt. 2: No. 41, Des Morgens aber hielten alle Hohepriester und die Ältesten des Volks einen Rat (Evangelist, Judas, Chief Priests)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505754f1c8741ac15068c6cc4c09c4d24a6a80e20954ef0e76d496f109266b1e. 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/SEAEB1900410.
No. 45, Auf das Fest aber hatte der Landpfleger Gewohnheit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dbdbcd31249aaa3989a9867f76de9c54e4affe938efa9155f4e730d6265157. 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/SEAEB1900450.
St. Matthew Passion, BWV 244, Pt. 1: No. 11, Er antwortete und sprach (Evangelist, Jesus, Judas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dee12953877afbe1aa65725fb3dce5cadad66bf35a153d334e22c5d267e3d85. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/SEAEB1900110.
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 0x218632da61ff1f5c2aba818d8b2b7409087343381411918f6bae9be31a2a6489. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/SEAEB1900230.
St. Matthew Passion, BWV 244, Pt. 1: No. 24, Und er kam zu seinen Jüngern und fand sie schlafend (Evangelist, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7dcf7aa7732906cfb2045846f754188aff6a60158ccec6c6b9ba4e46b963985. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/SEAEB1900240.
St. Matthew Passion, BWV 244, Pt. 1: No. 26, Und er kam und fand sie aber schlafend (Evangelist, Jesus, Judas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd140b9576f09cdabf84f62b09e18f8847159e89a5de066c074d54f4af787c24. 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/SEAEB1900260.
St. Matthew Passion, BWV 244, Pt. 2: No. 33, Und wiewohl viel falsche Zeugen herzutraten (Evangelist, Testifiers, High Priest)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c32ae383f54721bed27acf378a0313ed9bb3806bd2a25109889e53922f1435a. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/SEAEB1900330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73651101fbc23bbb0544cd1af36aa634764fa7519695bcbd390cc13b37c0f0d8. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/SEAEB1900420.
St. Matthew Passion, BWV 244, Pt. 2: No. 43, Sie hielten aber einen Rat und kauften einen Töpfersacker (Evangelist, Pilate, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e70eb8c883bb6edc4a625b59afeaf3ee3acaa996c0190b5e148f0c9e2af2b40. 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/SEAEB1900430.
St. Matthew Passion, BWV 244, Pt. 2: No. 50, Sie schrieen aber noch mehr und sprachen (Evangelist, Pilate)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc1fd059d4f70649f6229fae1af304787dfbbf704837da83e38b754fd3fc295. 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/SEAEB1900500.