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 0x6917a4157f8c31ff5a210611c124f35d657c2d510fdd7465daccccfb10b5c974. 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/e447dded-801a-414b-a97b-b01f6484d1c1.json and https://artists.proofprofile.net/proofs/artist/e447dded-801a-414b-a97b-b01f6484d1c1.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Charpentier: Te Deum, H. 146: II. Te Deum laudamus
Charpentier: Te Deum , Grand Office des Morts
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 0x3d23c8adceac19b2c947b6dad29675c63276a04ab2ba876d6a1b7d8166ace51f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0402654 — a six-check JSON result.
Charpentier: Te Deum, H. 146: IV. Pleni sunt coeli e terra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f8dd4928c60c999fd1e9bf34912843f0e3001d7e7d199aaf8a971e38c20f29. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0402656 — a six-check JSON result.
Charpentier: Te Deum, H. 146: V. Te per orbem terrarum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841f90adebc7bde6e2f9d4e1b9af1a9e054e451dc3f5d5ecd384b10231532c30. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0402657 — a six-check JSON result.
Charpentier: Te Deum, H. 146: XII. In te, Domine, speravi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ebb12de0f620a1145d60e02cf12f528977b8a0b5377a2d583a9c2ee9251e927. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBAYC0402664 — a six-check JSON result.