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 0x684deeee2afa9cc123c50fd30a54663e96b102a555b18edc91e1092dcf5d96e4. Chain 2 (Bitcoin): anchored in block 953955 (2026-06-16T14:29:53Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/265d5efe-aa71-4977-8e57-d46564314519.json and https://artists.proofprofile.net/proofs/artist/265d5efe-aa71-4977-8e57-d46564314519.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Komm, Jesu, komm, BWV 229: I. Komm, Jesu, komm
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 0xabaa84691d3ceece293fbee53eeee2f372610550db2b12a172d9ab400482230f. 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/SEAEX1751010.
Fürchte dich nicht, ich bin bei dir, BWV 228
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb118db613343608cf1e8b93e52c53ca98c91cde67ca994164af2602d9545944. 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/SEAEX1751030.
Der Geist hilft unsrer Schwachheit auf, BWV 226: II. Der aber die Herzen forschet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e9dd5457f02ec1886d92d217561fb25b20e72e480b2660092f341b2a1fb36a. 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/SEAEX1751050.
Jesu, meine Freude, BWV 227: II. Es ist nun nichts Verdammliches an denen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50fafd4c46e6a45f939bdc809fb2721dfd916c2bca292d46df6bf0521cb84898. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/SEAEX1751080.
Jesu, meine Freude, BWV 227: III. Unter deinen Schirmen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c663ac92c13a81f54e841321f76bbed9f48637f24ded5a94c9f588f8b12b80d. 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/SEAEX1751090.
Jesu, meine Freude, BWV 227: IV. Denn das Gesetz des Geistes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92cafff075a4c66bd640896a2bb5c3c42ceedd9ec671b359d1c94fd2e140532. 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/SEAEX1751100.
Jesu, meine Freude, BWV 227: VI. Ihr aber seid nicht fleischlich
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0f00932262a5f371a5082a243dd572453f71d9d3401e8bd058f0bc1cd92c72b. 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/SEAEX1751120.
Jesu, meine Freude, BWV 227: VII. Weg mit allen Schätzen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b5602b6b2ea8c77b0228bb6c344cf799201bb67a3856f7a4751773b5a6dd53. 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/SEAEX1751130.
O Jesu Christ, mein Lebens Licht, BWV 118
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48ae2c87fd99b71edfecbcc5666bad0a291bb2d387f5cdd2b6a509a454b45f1. 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/SEAEX1751190.
Singet dem Herrn ein neues Lied, BWV 225: III. Lobet den Herrn in seinen Taten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8582e31089a4a417e6a067249488f896d4b1e9e6943a14b5a90eb344027b75. 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/SEAEX1751220.
Komm, Jesu, komm, BWV 229: II. Drum schließ ich mich in deine Hände
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7671d7baa2766a21b45ac8d00214df26d739e528ac822187a9fdfc311fadb5f. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/SEAEX1751020.
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
Sonatina in C minor, TWV 41c2: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f8f18e2262c6f40169b5758f17e71567b723fe9f183f1b050af075e0d57054. 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/NOEHX1912020.
Sonata in F minor, TWV 41f1: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e9fe9d8ed580b253c3e8fc9f2adf9f77d00ba883dce9ca9e45adc5b88ab186. 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/NOEHX1912140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dd3e06298b2a30506b48c1355705062ca8eb55251efa1cc0021f620065649e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NOEHX1912010.
Sonatina in C minor, TWV 41c2: III. Dolce
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9686292de84a5248b2a6f727bec49b31e442f21c354acbad9f74526ed976edd6. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NOEHX1912030.
Sonatina in C minor, TWV 41c2: IV. Vivace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7804d5e895a3cefa12f59b902cfad2e34913ba0d264624f430e2a92444602e. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/NOEHX1912040.
Sonatina in A minor, TWV 41a4: I. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fff0bcb138a7a28f4ad042144b48d71a5858c860dc7735f37110bd90ab1cce. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NOEHX1912050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52039c01887b316ae620096764abe1294cdd3da6e0dc1cc81c33a75a5795b633. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/NOEHX1912130.
Sonata in F minor, TWV 41f1: III. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e173a57018e309e623e1545e7cf1f82d92f6e6be959f6eb795e2bea53ce812. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/NOEHX1912150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44aff76fd529937e7095fd42367ee175b57d40b0099110d8acf9198cda36570b. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/NOEHX1912160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f4b2aab1513ceba7f0b4e757cf20f3e3d1397d1d073dac71007a313a7415430. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/NOEHX1912170.
Hønsefødder og gulerødder, Danish folk tune (Arr. for Recorder Quartet by Pernille Petersen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a19ae2648b2ab1745993ad514dbd58f6b2229fe36b863e88c4a60249c097b1. 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/NOEHX2310200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79279af41b0c73aa82255bfb0c2bf89b5b811c478c2b423510dbf19d7cd854c5. 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/SEAEB2211180.