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 0x4d545dbf82d7d0c0cb4f75d6a2cf443161dcba8ca50288d46c47792ba140c1a7. Chain 2 (Bitcoin): anchored in block 954500 (2026-06-20T04:47:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9b9d4f7a-e03d-4a2e-9320-953c8ea5af2f.json and https://artists.proofprofile.net/proofs/artist/9b9d4f7a-e03d-4a2e-9320-953c8ea5af2f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Charpentier: Les plaisirs de Versailles, H. 480 & Les arts florissants, H. 487
Les plaisirs de Versailles, H. 480: Overture
Boston Early Music Festival Chamber Ensemble
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 0x017861e35c3de1be4a93fe46ff78106f0a6eb9f4f9cf50e62aa7fb394dbf692c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEB201928301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1801555a0cfaecf041192f1e8c942225c20c8980ac7930eeebfae9c50454f3e2. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEB201928314.
Introit for the Dedication of a Church: Terribilis Est Locus Iste
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c17b3558a51f867e647efd7e3638c98a1e5ea1ac524c4d2976216f4a1e9edd. 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/QM8P42100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387e8b28118056b879a8b2e78bf6c5ca62bcc274a447c2d40cff4e81cb3c9b6e. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM8P42100002.
Ordo Virtutum: Pt. 1, The Soul Invokes the Virtues
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8050090789365a1e66ca848c46ec8841118a974a55e156977f1d684b71a80715. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/QM8P42100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d3dea3b4d27cda48ed89dbf149be984211018aa7e58b138b9342965898c5ac. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM8P42100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38650a88d30d81689270f392f65d253609bebff59f1e439a5ebc2c3e779f0927. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QM8P42100005.
Ordo Virtutum: Pt. 4, The Devil Is Bound
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904f049a2882c5325513b5e4e480086a36d85fd7da284513a4a35454d941d08f. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QM8P42100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172ee1a74156bd91e337d16237f61772e0d999b19553a038b2f0ae5f0b204917. 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/QM8P42100007.
Lalande: Les fontaines de Versailles, S. 133 & Concert d'Esculape, S. 134
Les fontaines de Versailles, S. 133: Ouverture
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49436446122ff6a81cc8c50d28e362ebcd2b7bb3bf19aa6d517aff0a0506663e. 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/DEB201909701.
Les fontaines de Versailles, S. 133, Scene 3: Chaconne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b0889cb0fff2ad41e9520a704f5d46908607844a0cc439a1f6de230320c916. 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/DEB201909708.