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 0x5c3ea2dcba874ead049dc2be131160a657b5a1db03d61859f8c5f13ef2c66da1. Chain 2 (Bitcoin): anchored in block 953955 (2026-06-16T14:29:53Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25d4b73b-6177-4569-bcb6-2876b36faf50.json and https://artists.proofprofile.net/proofs/artist/25d4b73b-6177-4569-bcb6-2876b36faf50.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Marais: Folies d'Espagne - pièces inédites
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 0xc5817c3757bde3c86791d8ce524ee316e811d760bb53afa0dd1dd09d6d14119b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ070001340 — a six-check JSON result.
Prélude pour le Théorbe - Théorbe Seul Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb319843b510946e7244b3bbe98f6d1bd35629c842f2c8e0d0b2bf483c4e4d0c7. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ070001390 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cb983879406e9a5a44daf913f9d3a7e8880a84a921fe4f59f83505bebde348a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ070001410 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b643eb38414294717b1fcf057e1760893216e03c14692111772ed2c5ec64d5. 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/FRZ070001420 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a168bacc36aaea5c750d9d4fbf1dacc1a1e9f68f07e471c902401dd1fb842d. 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/FRZ070001430 — a six-check JSON result.
Sainte Colombe: Suites pour viole seule, concerts à deux violes esgales
Doctor Coleman: Music for Solo Lyra Viol
John Merro's Book: Music for Lyra Viol from 17th Century England
John Merro's Book: Suite for Two Lyra-Viols
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0203d54c03ede0e441a7034fea78353a4e750c3c392b91cd2cc82a7ddfe734. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM92009826 — a six-check JSON result.
John Merro's Book: Lachrimae for Solo Lyra-Viol
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa45c3eeae8f92f587a2406954b4a2e359ce311dc5e254e8854d4f69bb1d3c3. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USHM92009827 — a six-check JSON result.
The Best Of: Marin Marais - Charles Hurel
Couperin: Portrait d'Iris, Suites pour viole de gambe et pièces de clavecin
Louis de Caix d'Hervelois: Sonata No. 3 in B Minor
Charpentier & Lully: Te Deum (Live Recording at La Chapelle Royale du Château de Versailles)
Te Deum, H. 146: I. Prélude - Live Recording at La Chapelle Royale du Château de Versailles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8a1d572abfc11127707fafde891572655bb43a5b73b1a7bdeb40ceaa8f9c5e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1395201 — a six-check JSON result.
Te Deum, H. 146: II. Te Deum laudamus - Live Recording at La Chapelle Royale du Château de Versailles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe843e890c3501e20af4aa826a2029cce27dc0af243235481211acbd6a40b4be. 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/FR50X1395202 — a six-check JSON result.
Te Deum, H. 146: III. Te aeternum Patrem - Live Recording at La Chapelle Royale du Château de Versailles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d20f054291433abc3c4c4bbac2e596bdc5b2356fd7582f84571f4daaf44934d. 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/FR50X1395203 — a six-check JSON result.
Te Deum, H. 146: I. In te, Domine speravi - Live Recording at La Chapelle Royale du Château de Versailles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a04ffd2d95bc2cc100534b8f61f762f465166f077722ab20f125d32c309798e. 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/FR50X1395209 — a six-check JSON result.
Te deum, LWV 55: I. Te Deum laudamus - Live Recording at La Chapelle Royale du Château de Versailles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55161a4de2e6be45f0a568b1356dd22efbae4baedc16dbc3d4c9894ba5ef1e99. 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/FR50X1395210 — a six-check JSON result.
Te deum, LWV 55: II. Tibi omnes angeli - Live Recording at La Chapelle Royale du Château de Versailles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd20afcdcced11d6631b558a4fc143a31da0841335555a71d97073026bccfdab6. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/FR50X1395211 — a six-check JSON result.
Te deum, LWV 55: III. Pleni sunt caeli et terra - Live Recording at La Chapelle Royale du Château de Versailles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1199d560eb755808ba5d66259520b980411c660095a077d2297526eabe80d2. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1395212 — a six-check JSON result.
Te deum, LWV 55: VII. Te ergo quaesumus, famulis tuis subveni - Live Recording at La Chapelle Royale du Château de Versailles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3799f0827107e9202b9676f5a3c18cd0a4d03c20d83be3fb96dacf5519a48dba. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR50X1395216 — a six-check JSON result.
Te deum, LWV 55: X. In te Domine speravi - Live Recording at La Chapelle Royale du Château de Versailles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277c036a81041fc153305abc91cebc432c08ecd68a8d3768d15e64a1b3885bb4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FR50X1395219 — a six-check JSON result.
Suite in C Minor: VI. La Savigny - Allemande
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720a9c63b35a6f17afc8e78849522d3c6e7bdd6523a7cdd485ecddf427424684. 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/USHM92124109 — a six-check JSON result.
Rameau: Les Surprises de l'Amour, transcriptions de Monsieur Hesse