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 0x4c0ed7f514d322df393c6268c3c53a806ba5479de8fbf96eb8964c544ad07965. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/108891a8-6332-4fad-af8f-9d1c8e752b50.json and https://artists.proofprofile.net/proofs/artist/108891a8-6332-4fad-af8f-9d1c8e752b50.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Wachet auf, ruft uns die Stimme: III. Gloria sei dir gesungen
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 0x1e4cd68df80b55a55f8bbb3d4c3073e9837ac046adc3496daa78df10b21255f7. 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/DEB110801003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1bebf6d54970489104c07b472d0452a02eb394e7af6222cd99123e769f6c43. 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/DEB110801004.
Befiehl du deine Wege: II. Dem Herren musst du trauen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f4211e4cf63c49ee71718a4a93205709ffea1f8c2a5cac66ce186afc6ef8ec. 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/DEB110801010.
Befiehl du deine Wege: III. Dein ewge Treu und Gnade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237562fce72a185d4f97a096b908d37c89cb2350351f70684739ff5a7359cfda. 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/DEB110801011.
Befiehl du deine Wege: IV. Weg hast du allerwegen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf35636b0d710890f98d49f6a3f2d5584bfc4483e81338cd751378f698535656f. 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/DEB110801012.
Wachet auf, ruft uns die Stimme: I. Wachet auf, ruft uns die Stimme
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ed41b9dc3123ed1cbf9318ebe853aa3580daf778c5ea883a8c6cc4affbd4e1. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEB110801001.
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 0xf25254e6309f303aaa43fa2d8b8a197cf8d71f58d81728ef1def4c2c9388871d. 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/DEB110801006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9eb71064438312f91a43838579ee4936ecd47cf87fb4a5712878e24e5a5e69. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEB110801008.
Befiehl du deine Wege: I. Befiehl du deine Wege
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5205d9bd262c84452b823591784a0255c7f4276f8f5dd941e56e45d5bedbe86d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEB110801009.
Befiehl du deine Wege: V. Und ob gleich alle Teufel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe394ee3b8c2c88c11d556302cec87bf5e0ad79654bef7ed1ebc015cb9f41e30b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEB110801013.
Befiehl du deine Wege: VI. Hoff, o du arme Seele
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4512aca91b0342c79e2052af4192554fe6c369c5364795c6b9c12935994d51a. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEB110801014.
Befiehl du deine Wege: VII. Auf, auf, gib deinem Schmerze
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06518faf5947b5ab2578356b613098213389675b3dc3ccae52e9d17f3ac5c27a. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/DEB110801015.
Befiehl du deine Wege: XII. Mach End, o Herr, mach End
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2328041003a9f4dae2fd34fa4eabd866fbd1de52862d48c6745e3235ece9f431. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/DEB110801020.
Dixit Dominus, R. 807: Virgam virtuis tuae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de0d5eddfdd656501c07c31559a7415058461aad0e5cc986d1c00329800fccd. 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/DEN960630103.
Dixit Dominus, R. 807: Dominus a dextris tuis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03caab5eac3308a28c5779e5615f73a5ec00d8118feee3a1791d6fd9204a9804. 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/DEN960630106.
Dixit Dominus, R. 807: De torrente in via bibet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7bb31a4217b1ccb37e120ac15f9d1dcfddb61ab981dfc12a3d5567d20be3ea. 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/DEN960630108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc52274d05eaa83854ad241d55da652b622bb8972fd682e1ccde4258d13202f1f. 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/DEN960630101.
Dixit Dominus, R. 807: Donec ponam inimicos tuos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a778cf1e06dac9380b11a9c9846a2ab0201d7aa599c5d5f83b29a4624ace31. 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/DEN960630102.
Dixit Dominus, R. 807: Judicabit in nationibus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9901c0d92d01abb103cb9e84cbfd09f8d25564a3cc80dc48a31ca81589df53. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEN960630107.
Dixit Dominus, R. 807: Gloria Patri et Filio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55dd7b1fe95015f1ebb74fff60f134b0836fd5677d3ec53a1917f76e42879a9e. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEN960630109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5492dee91a3b1296742512d00a6ae1270806437de8b6f048e80be0520e68f2aa. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/DEN960600111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca9aec152a1663fe747f4aa6e431a1f692f8b9871feabfa5aeee7fe04fbdbd3. 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/DEN960600112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc2e63fbf59bf65a0d7ebaef2ffd7690d1f41955529b01d8ad75e369f0004e8. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/DEN960600113.
Weihnachten an der Dresdner Frauenkirche. Homilius: Kantaten II
Ergreifet die Psalter, ihr christlichen Chöre, HoWV II.1: I. Ergreifet die Psalter, ihr christlichen Chöre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31c5b6d90623ab9373386fb42472bea9420e7b881cd84ce3fc5c0c8b14624c4b. 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/DEB110501301.