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 0x8840031a64b383b193d591f85de97ede84b34bd06a11060148b144d68d697c2c. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5fb9a29e-a934-4662-ba41-2c448bab75a3.json and https://artists.proofprofile.net/proofs/artist/5fb9a29e-a934-4662-ba41-2c448bab75a3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
II. Der Himmel Lacht! Die Erde Jubilieret BWV 31, 1. Sonata
Holland Boys Choir, Netherlands Bach Collegium
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 0xa64ed1cea98d4f3dddb9cb5508533992aec7695bb21a979fbeda1e49470b5d94. 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/NLN580537704.
II. Der Himmel Lacht! Die Erde Jubilieret BWV 31, 2. Coro: Der Himmel Lacht! Die Erde Jubilieret
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af48c84839b87dba89a93015a18993ad2a139ecf66d663051809d1588bdd89f. 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/NLN580537705.
I. Herz Und Mund Und Tat Und Leben Bwv 147, For The Feast Of Visitation,mariae Heimsuchung, Seconda Parte: Choral (Coro), Jesu Bleibet Meine Freude
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0a307baf484051275a3a8b67a511f6b29aa8873cf8df6375f675e4f0eb7fb91. 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/NLN580505209.
I. Jesu, Nun Sei Gepreiset BWV 41, 1. Coro: Jesu, Nun Sei Gepreiset
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37be3777ec0d827b8cb3042831af1a5d9626049cdb386a569058d7aa4aa651a5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLN580537720.
I. Jesu, Nun Sei Gepreiset BWV 41, 3. Recitativo (Alto): Ach! Deine Hand
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a68596c931f1a8feebd9241d7a50b713f333563cf34b68ad16a940f2172f18. 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/NLN580537722.
I. Jesu, Nun Sei Gepreiset BWV 41, 6. Choral (Coro): Dein Ist Allein Die Ehre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd308ea824ea926d2beb11b7845a9ebd89d07314f600dd9c47a410ce27ac5afac. 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/NLN580537725.
II. Wir Danken Dir, Gott, Wir Danken Dir BWV 29, 1. Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed8e9c4c46317bae25a278ef33018a92aece78c8849a6e86ec1ee308097a312. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NLN580537726.
II. Wir Danken Dir, Gott, Wir Danken Dir BWV 29, 2. Coro: Wir Danken Dir, Gott, Wir Danken Dir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x243779abfd403fc1d591fa947b7dad33cef2f06099b4004f265aa1e748dbca91. 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/NLN580537727.
II. Wir Danken Dir, Gott, Wir Danken Dir BWV 29, 4. Recitativo (Basso): Gottlob! Es Geht Uns Wohl!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fc5b6cdf26d3aabb705b0bd134d566a45b691e815d952d0924f9a15430f69f. 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/NLN580537729.
II. Wir Danken Dir, Gott, Wir Danken Dir BWV 29, 5. Aria (Soprano): Gedenk An Uns Mit Deiner Liebe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a8bb5444f161cd7ec380eff47d6358ae7b415c68e8b76b66d27459b2f07afd5. 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/NLN580537730.
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
II. Wir Danken Dir, Gott, Wir Danken Dir BWV 29, 7. Aria (Alto): Halleluja, Stärk Und Macht
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfe831bf24e3eef30d9d40e9399eb9904fc37c42cbf85c9b22d52017a03a7b6. 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/NLN580537732.
III. Gott, Man Lobet Dich In Der Stille BWV 120, 1. Aria (Alto): Gott, Man Lobet Dich In Der Stille
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3c36349ce0f3844ed4d8a2e40851bed058a7f3c3541bc930566d8f35dd4a1c. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/NLN580537734.
I. Weinen, Klagen, Sorgen, Zagen BWV 12, 1. Sinfonia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb06fabea3357701c6c3b1d4a9701b3cbb7a342d1e4c1d9e7eb9d41a833c96a5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLN580537508.
Bach Edition Vol. 19, Cantatas Vol. X Part: 2
II. Lobe Den Herrn, Meine Seele BWV 143, For New Year's Day, Am Neujahrstag: Coro, Lobe Den Herrn, Meine Seele
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb67549af0fa2aa65587f5e94d421a907dc4c93eafef0365e2457887dff75dc. 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/NLN580504955.
Bach Edition Vol. 18, Cantatas Vol. IX Part: 1
II. Wie Schön Leuchtet Der Morgenstern BWV 1, For The Feast Of Annunciation, Zu Mariae Verkündigung: Coro, Wie Schön Leuchtet Der Morgenstern
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32498bffcf149faae435e585d3017a80b197e0e12b457afda4d135a95c31ed3. 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/NLN580504840.
Bach Edition Vol. 15, Cantatas Vol. VIII Part: 3
Bach Edition Vol. 19, Cantatas Vol. X Part: 3
Bach Edition Vol. 18, Cantatas Vol. IX Part: 4
III. Meine Seel Erhebt Den Herren BWV 10, 1. Coro: Meine Seel Erhebt Den Herren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9055ef293b37fd35adf103ffeb36f4b39adacc9856ee0cc20656dc6552f7c0ab. 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/NLN580537577.
II. Unser Mund Sei Voll Lachens BWV 110, (1) Coro (Solo: Soprano,tenore, Alto, Basso): Unser Mund Sei Voll Lachens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3775f2c0938f09d2330abb766243c52ad9a45aa52b550ce6ca8b34756894d7. 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/NLN580537059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486ea1aef0daf5172655bb9eb2afdeeb5a5fa10127290de3a940dc8bd681ebfb. 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/ISW211300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e50223b4d6686c9bf0731a058748fe5bf4081c0750135072e41bfe4da78ac1. 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/ISW211300102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeaa25c75e5b278af9fef7d63036a87134eb8898934ec02bb2a8126662dfe59d. 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/ISW211300104.
III. Ich Hatte Viel Bekümmernis BWV 21, Prima Parte, 2. Coro: Ich Hatte Viel Bekümmernis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbe6ef6cab5bded1ae305b1c7d64417aa5ba78ceac1a229de981c44f2f60042. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLN580537474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8828a858dbf1e19ad2623f1f485a3d8b03a34c871bf43809021573c79b6506. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USKC62202502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d70f045372f76ef0f0124fbc95bdd0ac4666b228b383144591491f23633f8d4. 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/USKC62202503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ba92362b57d2feb7e3533fc570450081b38c0700152a1aac663ffd16c381ed. 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/USKC62202504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cad57e4a9cd5e49614e66ed9e80ca421d1d0d2d4fb9836774a0c5dc55663c02. 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/USKC62202505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedeb914bc01c74a49dcd07d055fe65ec74c7d8ac6fd707c5678eda1bccab746. 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/USKC62202507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2314b1dabbb656cc197dbd5b5f11b060e8cd6619cd5bb4ea21928972c30eb4dd. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USKC62202501.
Bach Edition Vol. 19, Cantatas Vol. X Part: 5
Bach Edition Vol. 19, Cantatas Vol. X Part: 4