thumb|Nicolaus Bruhns House in Schwabstedt Nicolaus Bruhns (also Nikolaus, Nicholas; late 1665 – in Husum) was a Danish-German organist, violinist, and composer. He was one of the most prominent orga
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 0x7872246027569bbd9280d3432bae4c12f3c8d1267160ebb45736ef32b689a9b5. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/724e6235-216f-4a5c-b229-a378e55db974.json and https://artists.proofprofile.net/proofs/artist/724e6235-216f-4a5c-b229-a378e55db974.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hemmt eure Tränenflut: I. Hemmt eure Tränenflut
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 0x6c6b4fc15fef5a7f3df23c7708ce367a8f6b4078eb1979cbf047e08c9b9e5fe2. 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/BER188829101.
Hemmt eure Tränenflut: II. Der Stein war allzu groß
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3274b4ba93aa6dc77e45646eb7136962376bc9b24f02856a728e6fb794954acf. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BER188829102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb5142612a6542b47b1c4c78384c2fc4490f820035847523d7ed659e1e9aad1. 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/BER188829105.
Wohl dem, der den Herren fürchtet: I. Wohl dem, der den Herren fürchtet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7accc25a45087ee8b964e9553e140cc8d209134f37de940f3ffc4ef320093317. 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/BER188829109.
Wohl dem, der den Herren fürchtet: II. Dein Weib wird sein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83299e128d3ccb7095c3045bdd86b057c3b5d45616b96d0b8e1bcf30d448f838. 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/BER188829110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49189ca8913fde7c967fe2a32a0dfdaef53f92bbc0407ca97537da0c3bd5320. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/BER188829128.
Ich liege und schlafe: I. Ich liege une schlafe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2f908b9f07da7edd455eec1b01438d60c58fda3ed64755858106881f98957e. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/BER188829131.
Bruhns: L'oeuvre d'orgue - Cantates (Orgue Delaunay St Pierre-des-Chartreux, orgue Ahrend Musée des Augustins, Toulouse)
Geistliches Konzert für vier Stimmen, Streicher und Basso continuo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc2d97574cf138e314513f096eaff28c8966cc592aa833fdd0575efc1dde965. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/FRZ140105010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3ef5299e29d43e88ed553ada53b4ee4eaeeace42a1d0b8eb5c574293a74152. 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/SEAEX2171040.
Bruhns: Preludium in E Minor "Big" (Arr. for Reed Quintet by Jelte Althuis)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6e2cdff1545faa037c154f7de3d090a70cfdfd14839a81cf5d6d7dee8279dee. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRZDG1801292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4d4a9f1ff5069e00f9f77eda968329b5998941b5c242f6a3859f0c034807c8. 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/NLY331403115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd7695a088e6eafb0f6d952114eccd5088c7ad3bc7828ff90a2a26d103fe401. 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/NLY331403116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9de6a2b422848f4b43007cd4b578599fcd2811c993864ad6c1c4c524d481112. 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/NLY331403117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881ad5d6d8716d9bab71b6312718c522c85221f1d3b02f1199ca4e3db272a32e. 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/NLY331403118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa238ceaee642f8779a0d5c73fa61a6ad9aabf522621fc128b2a1deef5d5b9ace. 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/FRU620704101.