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 0x67e40f2484452169feab9cfa1c831e45ba34813edbb54da99510567de913d014. Chain 2 (Bitcoin): anchored in block 953709 (2026-06-14T23:31:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d39c223-f204-4b75-afbb-e6f6fcd8f787.json and https://artists.proofprofile.net/proofs/artist/7d39c223-f204-4b75-afbb-e6f6fcd8f787.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Charpentier: Miserere des Jésuites, H. 193: II. Miserere mei Deus
Charpentier: Le jugement dernier, Salve Regina & Miserere des Jésuites
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 0xc1be182c47b4f52c92eb71afb5142a7e7d406e7154f9d9b985fa3d75ce1de675. 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/FRZ202200128.
Charpentier: Miserere des Jésuites, H. 193: III. Amplius lava me
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d23e11c2b21fa283da85330e2ed90c4085d68171e44b8540feee53059f6d77. 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/FRZ202200129.
Charpentier: Messe pour les trépassés, H. 2: I. Symphonie - Kyrie
Charpentier: Messe pour les trépassés, H. 2 & Motet pour les trépassés, H. 311
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4ad637b44861a7bff577a49423a0cfacb8dfeb7f5424d06d69371ed2451a84. 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/FRZ207309001.
Charpentier: Dies irae, H. 12 "Prose des morts": I. Dies irae, dies illa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8202f6e844a24d2947a145150328f00e154f780ace4a14e28f91e1280e94dd. 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/FRZ207309002.
Charpentier: Motet pour les trépassés, H. 311: II. Hei, hei, mihi Domine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d8db53d5cdb07d30ee0645e93c4b0a8bdc7b38148452298e142f796f638565. 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/FRZ207309102.
Charpentier: Messe pour les trépassés, H. 2: III. Pie Jesu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a31cea32e57885103ad6d9164f7782e7c3331e58e1bcee8ed2bd912dcfa0de0. 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/FRZ207309007.
Charpentier: Miserere des Jésuites, H. 193: IV. Ecce enim
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf70fb27bde3408bfbce19b998b8a3764f9a7b1d55bab062b4ef25fdf7f64e98. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/FRZ202200130.
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
Charpentier: Dies irae, H. 12 "Prose des morts": IV. Oro supplex
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4771be8199c366eb62edc374df48dddeaa4b59ab97cc89aaf412fed74e40b814. 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/FRZ207309005.
Charpentier: Messe pour les trépassés, H. 2: II. Symphonie - Sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2131f2756a1b3b1ba5f5f7992b2d78290649be7d01d4b50e15d273a1428530f2. 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/FRZ207309006.