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 0xa7126647cdd223f3e95b59bdff607dd589f56c9c3a87e7fb38273dc1af319cee. Chain 2 (Bitcoin): anchored in block 954693 (2026-06-21T11:50:32Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6d0f1f0-fcd4-4b2d-b321-c90debdfd2aa.json and https://artists.proofprofile.net/proofs/artist/e6d0f1f0-fcd4-4b2d-b321-c90debdfd2aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Missa dolorosa, Kyrie: I. Kyrie eléison I
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 0x1715ae15830cbc0748e2d0282d8304b8d1d3a78717c6c1c32257beece0a47514. 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/FRZ090300027.
Missa dolorosa, Kyrie: II. Christe eléison
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafff05ab96a8f698295cda0a67da4c0760f62679e431230c59620d1aa2caa58. 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/FRZ090300028.
Missa dolorosa, Kyrie: III. Kyrie eléison II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef695770a0b99603842d26b925ba2ba79bdefbc02e44287632057a53acd4458. 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/FRZ090300029.
Missa dolorosa, Gloria: IV. Et in terra pax
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98046555ed9f6aabd8a9f37c1fc2fa7ae5bab11dfd03e91471889d2fc944df64. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRZ090300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05c8420b12930b331dd076efe67f616d019e10ccc0e7925fc357edb8e70e540a. 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/FRZ090300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f52955ffdd991cb6bde5c10376961899cc51e3afdd016203cdaf81da5003af. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FRZ090300032.
Missa dolorosa, Gloria: VIII. Quoniam tu solus Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4393a42ed3b352fa9b04c649bcecf31afa8fa18de744d9f0a5d8e627959d9e2d. 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/FRZ090300034.
Missa dolorosa, Credo: X. Credo in unum Deum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d69eabd16ed235f883a120df0f31db2978af3b48d47d66474a10cee290281b6. 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/FRZ090300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d58dd75014e0341c443ce8968a02fde286e2ebad874c443aa773dcebd2bb36. 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/FRZ090300037.
Missa dolorosa, Credo: XII. Et resurrexit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59f41862d35a9253ae028dae4c882cc358bbd8a4b526939eb08d374d0a46eb0. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FRZ090300038.
Missa dolorosa, Credo: XIII. Et vitam venturi sæculi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x067298082d6ab066a17c079e7924a4553ef6dfd8acbdc34dcd2f91840f3475c5. 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/FRZ090300039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c9546af604d432401e85a6d86aa880b581eac7b27b2ab78e90a96e306a54373. 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/FRZ090300040.
Missa dolorosa, Sanctus: XVII. Dona nobis pacem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd8dcc4a31afe97c9feaa5c6ededd1d004e091fdf93a0ba4b09b5776d1be010a. 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/FRZ090300043.