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 0x7ae761625f14fba9c264a0f6273a0ea33a2d73ef3cdac7607ad2a5e3ef2ce4fd. Chain 2 (Bitcoin): anchored in block 954689 (2026-06-21T10:35:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2c01a8f-e3db-442d-a3d5-05c22acee962.json and https://artists.proofprofile.net/proofs/artist/e2c01a8f-e3db-442d-a3d5-05c22acee962.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
O Haupt voll Blut und Wunden (Arr. Johannsen )
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 0xe41291608aea4cbeb7520fae78ac019f5ecca2cb26ba64c110957bdd3d700b25. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEB111200601.
Christi Mutter stand mit Schmerzen (Arr. Payer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c55c60faa6b41ab17bbda5ffc4df58f90658abd28a825abe539c3f09997717. 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/DEB111200602.
Herzliebster Jesu, was hast Du verbrochen (Arr. Johannsen )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8f26c889a4fc5764c5be8a385a9e1957bd39bd8f654fb8dc186b20c2ce4dc24. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEB111200603.
Wir danken dir, Herr Jesu Christ, dass du für uns gestorben bist (Arr. Johannsen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99db43ca500ef4299badb39be293d67212b33cc7a5bdfd5631fc66357152a8d. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/DEB111200604.
Müde bin ich, geh zur Ruh (Arr. Johannsen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678cfa91fb4aeab436538035c164f79bdde19c4ea81a599ac2f310c00c10075b. 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/DEB111200505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f03960aff71afd28763fa0e84dde6cf683c95ffd6df3b8d9d05ca4e2c70344. 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/DEB111200608.
Wahrer Gott, wir glauben dir (Arr. Johannsen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd215cf96c6d20884312209ba693f3b2fa59dc2952019899ce71d27d3a3c1553d. 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/DEB111200609.
Ihr Freunde Gottes allzugleich (Arr. Johannsen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792207a208e6e864095cd86d01fe18d8a50a76f86d9bad93729724c6678ffa2f. 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/DEB111200620.
Lobe den Herren, den mächtigen König (Arr. Johannsen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1cdce7d6ca0f57b85731386d22b434f8a8a2e788d8c4a1fa2b10660cc4ecf7. 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/DEB111200621.
The Bach Choir and Orchestra of the Netherlands
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa080333b17a5d0abf74732c9aec728b3679d5be041bf1f300a17dec8bb761d46. 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/NLC061300403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437240e03fa74171602baeba533a3aaa85885256f6dc1e34118a44295cfbe6dc. 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/NLC061300404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4675a52921918dedf3367f936da10735ecaa300c053d587add7ef1bdf6c9edd. 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/NLC061300406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df9b22a46a6fb8b896c80dac1e357bbedc74fff848b31adfe21692c892c5c4b. 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/NLC061300407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cfed0598e0d6fabcd1d95a0a6ce7c0c23fad2b6c7f69703e71ecc4b4c396ade. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NLC061300408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db45a491467a203f2fa01cc76dc9c492a1c8b5159fd65b7b59776d40149f800. 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/NLC061300409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea5d4b3f5ba5a2ae3c978caffaa35140f70a3aba69ac7554ce7e08d30e81351. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/NLC061300410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac1e63117e7c2481ba02e74a0d21e57a300983faf7ff3b592daa61527ab6242. 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/NLC061300411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa11e55df1bfa44345b178efddee42e523309322c29c80a41f4ae18bf39cc35. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/NLC061300412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e3d64f13790d7b18b67e046377a6043d2a764e53e6003f8f7bfd5441ea9428. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/NLC061300413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3931483349a628af2d1ada0769ab389f6898aa882a43ba08010bbac83bb24e4. 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/NLC061300414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e7995fd3c90c997d1618b88d9ff32632c9af43d0fd142eba14acdd9a536be0. 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/NLC061300415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3995ac7eec87da4d0919bb8048227eaade458cfda89d2dde4a3d9de1ee43ca32. 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/NLC061300416.
St. Luke Passion, TWV 5:13: Recitative: Israel, ach! Geliebtes Vaterz (Joseph)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd10f3129ff2d7160940e5cae2aea3dd8f66e1fd2244d72d1a1ae32bce687070. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEB201275401.
St. Luke Passion, TWV 5:13: Aria: Allgegenwart'ger Hort der Deinen (Joseph)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb983251440b0b7b8647d74cb55324bfb1ee42fe94493e3039cf130f33e0c4c. 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/DEB201275402.
Pucklitz: Oratorio Secondo - Musica Baltica, Vol. 9
Norbert Glanzberg: In Memoriam – Holocaust Lieder: No. 4, Alter Baum