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 0xf0b19e362b3c6c7922b762439810be09a6f75bac34ec040d1f19e8687b39fe54. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/283f49cd-d22b-40f9-b9c9-e83478cb4e50.json and https://artists.proofprofile.net/proofs/artist/283f49cd-d22b-40f9-b9c9-e83478cb4e50.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Matthäuspassion, BWV 244: 16. Rezitativ. "Petrus aber antwortete und sprach zu ihm" (Evangelist, Petrus, Jesus)
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 0xb936b9e41ff947952fd08c65defd5cd35c11bc068d41686654ed5ba066b08a93. 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/CH9211100198.
Matthäuspassion, BWV 244: 38. Rezitativ und Chor. "Petrus aber sass draussen im Palast" (Evangelist, 1. & 2. Magd, Petrus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89d43af1afdbf3d576bcd0339cfa305a3903151ce8bef828d57d513ade6af8f4. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CH9211100220.
Missa solemnis in D Major, Op. 123: I. Kyrie: Kyrie eleison. Assai sostenuto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29044a21d9e362f2f3895f0f75d0ae965f605e066d6e401e39db63a166224220. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CH4212300043.
Missa solemnis in D Major, Op. 123: I. Kyrie: Kyrie eleison. Tempo primo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23915c61ec35e914070d55fb1d84385b0f9b6973f9c2345cada3d817be299b5. 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/CH4212300045.
Missa solemnis in D major, Op. 123: II. Gloria: Gratias agimus tibi. Meno allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0508a825155e24db2b94b960134f8798a42d189a6dd2788eafd02b9a96a75c. 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/CH4212300047.
Missa solemnis in D major, Op. 123: II. Gloria: Qui tollis peccata mundi. Larghetto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f49b99add59736a9b789fbe5ce6bf6fde81a26aa23315000aa8ad471c70551. 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/CH4212300048.
Trauerfestakt, BWV 198 "Laß, Fürstin, laß noch einen Strahl": IX. Rezitativ. "Was Wunder ists" (Bass) - Live
Bachkantate, BWV 198 - Laß, Fürstin, laß noch einen Strahl (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x777544a6167a6e2d34e62e60ac57eea2d4ed9b15bb6d63ae22e9449eba9b585e. 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/CH9211600009.
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
Kantate zum Feste Mariae Verkündigung, BWV 1 "Wie schön leuchtet der Morgenstern": IV. Rezitativ. "Ein ird'scher Glanz, ein leiblich Licht" (Bass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e733b4000b03bb6930b33af98b0674fec63d1e7f39dfc328f1b798e191f7cb. 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/CH9211100052.
Wo soll ich fliehen hin, BWV 5: 2. Rezitativ (Bass): Der Sünden Wust hat mich nicht nur befleckt - Live
Bachkantate, BWV 5 - Wo soll ich fliehen hin (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe308beae0af732ec4d35f70551bc6ba9eae335d4b17dde6bd1d1a5a7b1e698c6. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/CH9211900078.
Kantate zum 1. Advent, BWV 61 Nun komm, der Heiden Heiland: IV. Rezitativ. Siehe, ich stehe vor der Tür (Bass) - Live
Bachkantate, BWV 61 - Nun komm, der Heiden Heiland (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea36a97cded07e10fc8a5974c09e4104afa1baefda1f0d52abc0fce9652089d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CH9211600075.
Missa solemnis in D Major, Op. 123: I. Kyrie: Christe eleison. Andante assai ben marcato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bef16bb12c3ec9e343e90604cdb26a2f3d83d3c6762cdb4418b002627df4095. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/CH4212300044.
Missa solemnis in D major, Op. 123: II. Gloria: in excelsis Deo. Allegro vivace Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c5867b16c88066830d1de8170d60c0fe85ba2588c6909287f51c54f52807d54. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/CH4212300046.
Missa solemnis in D major, Op. 123: II. Gloria: Quoniam tu solus sanctus. Allegro maestoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff789ff425d797d44f75298e0ac4387dab572fc0b6e1cbbe803032c4aedc90d0. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CH4212300049.
Missa solemnis in D major, Op. 123: II. Gloria:In gloria Dei patris. Allegro, ma non troppo e ben marcato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad033ffdcfca6ca387e1349e712ddeb052d7373388175430c0af863b578e9636. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/CH4212300050.