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 0x754d1717a85bfd169805c193e8b79267ab202ab0587745e84931219c5cdcda43. 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/6a4d3bf4-eb70-4791-af26-4041ad991928.json and https://artists.proofprofile.net/proofs/artist/6a4d3bf4-eb70-4791-af26-4041ad991928.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jesu, der du meine Seele, Cantata BWV 78: 1. Chorus: Jesu. der du meine Seele
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 0x160c281edb54dadf57f40cdb8644421463be8199fafe2ffd0c7714419ac4cddc. 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/GBF078810631.
Jesu, der du meine Seele, Cantata BWV 78: 2. Aria: Wir eilen mit schwachen, doch emsigen Schritten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d16961e6872f73189b4cd2a5c4bc91ea91a4f0ca68dfb325446254b7aa30324. 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/GBF078810632.
Jesu, der du meine Seele, Cantata BWV 78: 7. Chorale: Herr, ich glaube, hilf mir Schwachen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2456745256b02601fe4edf8ec3c381c2b2c9a54540d8318bee194716a89ab0c. 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/GBF078810637.
Was Gott tut, das ist wohlgetan, Cantata BWV 99: 1. Chorus: Was Gott thut, das ist wohlgethan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd852c5da9cf6f03581b8dfbbe1e5b171038bb919a028edcd0c55518706059764. 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/GBF078810641.
Was Gott tut, das ist wohlgetan, Cantata BWV 99: 5. Aria-Duet: Wenn des Kreuzes Bitterkeiten
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8c12dad70505b92dc65bc423b2c8f8286e09eb00d7bada893cec924b2d72de. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBF078810645.
Liebster Gott, wenn werd ich sterben?, Cantata BWV 8: 3. Recit.: Zwar fühlt mein schwaches Herz
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c2c31bdfcab756a0c5d24f26716c1c30e1cbbd6580ec9163ba390864092114. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBF078810653.
Liebster Gott, wenn werd ich sterben?, Cantata BWV 8: 6. Chorale: Herrscher über Tod und Leben
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b4bec011d25b5d65be2f42caba5b92229e9e4dc42f3c4254383966f72b2b41. 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/GBF078810656.