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 0xfdaae4a817a9e5a6203673ee56728b5cebae287478c332cd803d9650f53bd632. Chain 2 (Bitcoin): anchored in block 953933 (2026-06-16T11:13:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1f4e43b0-d0e3-4b01-af5e-0bd8f4ec1d5c.json and https://artists.proofprofile.net/proofs/artist/1f4e43b0-d0e3-4b01-af5e-0bd8f4ec1d5c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
St. Matthew Passion, BWV 244: Part I: Kommt, ihr Tochter, helft mir klagen (Chorus)
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 0xbd457d5aab0be01bf047c2b3a93d98b21c8ec03d9a2845343804b781d63937f5. 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/DELW71480001.
St. Matthew Passion, BWV 244: Part I: Recitative: Da das Jesus merkete, sprach er zu ihnen (Evangelist, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1da0f8fb82c1332edd31eb9ce98ed2d7477e348ee199524374f0d822501102. 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/DELW71480008.
St. Matthew Passion, BWV 244: Part I: Recitative: Du lieber Heiland du (Alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e118fdaab60a6c209107d626ad7d511ab585cf6bc5e3d669c5a988dc66947d. 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/DELW71480009.
St. Matthew Passion, BWV 244: Part I: Recitative: Er sprach (Evangelist) - Gehet hin di die Stadt (Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6dae53f9c4ae5829c215d2e25e29fa1bb143d146a8e550362b912fab6b847f6. 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/DELW71480015.
St. Matthew Passion, BWV 244: Part I: Recitative: Und er kam zu seinen Jungern (Evangelist, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2510e68231bbdbe0813afda8774ad9764b35e242c4cd734992022d74b329dfd7. 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/DELW71480032.
St. Matthew Passion, BWV 244: Part I: Sind Blitze, sind Donner in Wolken verschwunden? (Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e45ac0bead8d5aa927899dd03e82480504e8c5124d2458ebb2ef42710551de7. 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/DELW71480036.
St. Matthew Passion, BWV 244: Part I: Recitative: Und siehe, einer aus denen (Evangelist, Jesus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1c578560a6d71642944e3c78bdfb4b44ec6b3428ec0d41f18a3599cbdf5707. 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/DELW71480037.
St. Matthew Passion, BWV 244: Part II: Recitative: Und wiewohl viel falsche Zeugen herzutraten (Evangelist, Testis, Pontifex)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001be8e81f6d6b78c335b8f13da025ab9d12b43759178e7a4763388cce2b274f. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/DELW71480042.
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
Cherubini: Requiem in C Minor: Introitus & Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8ba2597b097e52e0c497004c779c58197ff618fe3f3bdd2808febb663cfe0f. 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/GBAYC0800152.
Cherubini: Missa solemnis in D Minor: Kyrie eleison II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c3b914ad87e793a909ed84402ca132509bf4380c5574b0f54752ce1f1a5157. 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/GBAYC0101614.
Cherubini: Requiem in C Minor: Dies irae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930cc39bc099d6b340871a1455b5973be00ebee37855a507a9b5e03630a0ee74. 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/GBAYC0800154.
Cherubini: Mass in F Major "Messe de Chimay": Crucifixus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb81d8925e31915b6c2eef12ac25f5aaa89b518333d0e1ed7a03a43b838914b. 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/GBPFW1000132.
Dvorak: Mass in D Major, Op. 86 / Janacek: Lord's Prayer
Mass in D Major, Op. 86, B. 153: I. Kyrie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254c90657ce08a4b626b2e8205dfe3627b46680e4a2b926b25c21708b1b62e28. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEAD60500801.
Mass in D Major, Op. 86, B. 153: III. Credo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x227b4f3489003d06f46a4c88665766afc8a0fe06b6467156301bb2703a6b0b37. 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/DEAD60500803.
Mass in D Major, Op. 86, B. 153: II. Gloria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d6b1039eaad0a475a22ca06fa7053c0db166e2d0b6af92ace7c78116a7b5d34. 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/DEAD60500802.
Mass in D Major, Op. 86, B. 153: IV. Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff195c4993e807a49574c92e8a7799485ff5992c47d883e80281dd619527c9b. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/DEAD60500804.
Mass in D Major, Op. 86, B. 153: V. Benedictus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc633378cfa98736b7303a2b1043714e3b8721e45c6453bbfd8ff6ea656eddc7. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEAD60500805.
Mass in D Major, Op. 86, B. 153: VI. Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a788e5d4594e6b9983fce678c1f2d792e6231d2c7eeffaf25464ad9f8ccd05. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/DEAD60500806.
Cherubini: Missa solemnis, Antifona & Nemo gaudeat