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 0x291470443aa55eeb23684f0b46d84bfd5b981141e67eadbee6554711a0081825. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c48d65ab-6640-4d3f-9883-a5eda45dfd5e.json and https://artists.proofprofile.net/proofs/artist/c48d65ab-6640-4d3f-9883-a5eda45dfd5e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Missa brevis in C Major, K. 220 "Spatzenmesse": I. Kyrie
Mozart "Spatzenmesse" Missa brevis in C-Dur, KV 220
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 0x66d9983345a7c1844ca204dd8b3dfb146ee81dab0b85f2201263fa22ca21f13e. 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/DEA809450201.
Missa brevis in C Major, K. 220 "Spatzenmesse": II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058036ce7383a14aa90f8aed227213ef74fc8ffcf1e28aafde878be5f3d7d06d. 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/DEA809450202.
Missa brevis in C Major, K. 220 "Spatzenmesse": III. Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07c0547dd59c3acb4d418426b88516434b4579d171b6526aa9df632397eed16. 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/DEA809450203.
Missa brevis in C Major, K. 220 "Spatzenmesse": V. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72fba1ac43522f46c3344a132b7170c404e20a6af7df6e7a2d7bd14262cdebe. 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/DEA809450205.
Missa brevis in C Major, K. 220 "Spatzenmesse": IV. Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde3e53629c315591f1f7d8c6cba88840d87b4b73a4599c5b5d76f2f8e50785b. 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/DEA809450204.
Missa brevis in C Major, K. 220 "Spatzenmesse": VI. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a56a758f5fa29f8c69a3cfd31e2b3d0c7d360f43d98a364cf807f7315631c46. 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/DEA809450206.
St Matthew Passion, BWV 244, Pt. 1: No. 1, Kommt, ihr Töchter helft mir klagen (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472aed4d4cc4d23215b46f65b59db19405864e10660cb961b67704c32c4f0983. 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/DEA800026501.
St Matthew Passion, BWV 244, Pt. 1: No. 3, Herzliebster Jesu, was hast du verbrochen (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b26aea191bf69ffe60747498f41606df6e0d99659968a19651d11dbb36581f8. 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/DEA800026503.
St Matthew Passion, BWV 244, Pt. 1: No. 4, Da versammleten... Da das Jesus (Evangelist, Chorus, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c98d891be65abb1d5701dc5fde7d5a6887aeac37946b87d55e2c7d2e4361a43. 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/DEA800026504.
St Matthew Passion, BWV 244, Pt. 1: No. 10, Ich bin's, ich sollte büssen (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9ce1ba506a9d33415f3720d2abc060f839550011b52bf017f98c7df2ea2de4. 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/DEA800026510.
St Matthew Passion, BWV 244, Pt. 1: No. 15, Erkenne mich, mein Hüter (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97eaa844a045092f9bf109a807a790b9dbcf736f1d847af36e67ca23d1bd5675. 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/DEA800026515.
St Matthew Passion, BWV 244, Pt. 1: No. 17, Ich will hier bei dir stehen (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da1f07dc8ef625d3f60bdeac8ef7e1cc20a427d6f97da48878c62110a266cf6. 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/DEA800026517.
St Matthew Passion, BWV 244, Pt. 1: No. 19, O Schmerz! (Tenor, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e8de016ebf131a09d2f7f5612edd84332769ba3140bc4879a94c8e78792112. 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/DEA800026519.
St Matthew Passion, BWV 244, Pt. 1: No. 20, Ich will bei meinem Jesu wachen (Tenor, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842797386222f7be383643fd08796f259d54807908efae844e1a32c06e170d01. 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/DEA800026520.
St Matthew Passion, BWV 244, Pt. 1: No. 25, Was mein Gott will (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7881ba084fc33a3808008dcafd8be84c8a7568cb1b5e3b2bee4767b7bcb00453. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEA800026525.
St Matthew Passion, BWV 244, Pt. 1: No. 29, O Mensch, bewein' dein Sünde gross (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41db8f5621a73f1dc6fdb6fc74f4b387460fb314d5de163968a51fc428a2f362. 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/DEA800026529.