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 0x7a671976a3a663500a80ac5614e289740a26c5efe79b12e59e08be96abe21434. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1682a69f-42c4-4d87-9c04-a4264b37838a.json and https://artists.proofprofile.net/proofs/artist/1682a69f-42c4-4d87-9c04-a4264b37838a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Stabat Mater, Manuscript from "Les Menus-Plaisirs du Roy": Quando corpus morietur
Les Pages & Les Chantres du Centre de Musique Baroque de Versailles
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 0xecf3d56b16f2d0b9c4563c95ddd5e06f00e3f08d0504c32caaf26011d3b0e8ea. 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/FR50X1530820.
Stabat Mater, Manuscript from "Les Menus-Plaisirs du Roy": Stabat Mater dolorosa
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb44b8cd9ccf30639efa173ede22cadbac9a6e5b38ef4230c87acc58b1f28a31b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR50X1530809.
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
Cantigas de Santa Maria: A Madre de Que Livrou
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37db7e3874447bcf717e2ce48bb9a162c40b8d20f096a201f009a48987d06cd7. 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/FR10S1719818.
Cantigas de Santa Maria: Qual é Santivigada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2055b382053ae6104ee6dc2575bf18fcf390a37cbe0535b67680ead0fc29f526. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FR10S1719819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979a8e4fe104825fff0547754d41147abc82e51f3c0ae4602aa1ed30a0601aed. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FR10S1719820.
Cantigas de Santa Maria: Sabor á Santa Maria
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe482e25a63c0b3073316b17e5502e527e4a1967b2a3f8c6bef75bb96ef9bc755. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/FR10S1719828.
Pergolesi: Stabat Mater. Marian Music from Naples (Alpha Collection)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842282427a5e208b23d45b245f94a47427b05e293a294010ee5b277014291b62. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/FR50X0000902.