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 0xdfea4a1166a3b0c51e1e81bdd0e73c5fa119b2093b26ca519228a51ff61caede. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/935937ee-5f06-42e1-8393-6c49a35b7c27.json and https://artists.proofprofile.net/proofs/artist/935937ee-5f06-42e1-8393-6c49a35b7c27.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Merles et grives - Larger Thrushes (Paysages sonores)
Savane d'Afrique - Natural Atmosphere of African Savanna
Symphonies de l'étang - Marsh Melodies (Paysages sonores)
Ambiances de Papouasie (Paysages sonores)
Ambiances du Brésil - Brazilian Soundscapes (Paisajes Sonoros de Brasil)
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 0x08110255f1415606b5ff9006fb1aecf9febbd03867e2a6cc81f6337cceb64449. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX190735959 — a six-check JSON result.
Le brame des cerfs (Forêts d'automne / Rutting Red Deers)
La France : jardins, pré, bocage (Country Ambience)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7d8d1e8dd1ca921d1c47ca38bab9ba4f37857a92c547341b15077be4d86e435. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FRX190901733 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa654863ecbc2b8e0ae40df1ea49abacdd06c3805910734ac275291b569af8a72. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX190901737 — a six-check JSON result.
Oiseaux d'eau, Water Birds: The Danube Delta & Mikri Prespa (Le concert des oiseaux)
Oiseaux des Alpes - Birds of the Alps (Guide sonore)
Forêts de Pologne - Bialoweja Forests of Poland
Balades en bord de mer - Coastal Walks (Paysages sonores)
Les quatres saisons de la nature (Nature's Four Seasons)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2624642103f8ce2ac493afafa628b4c00b3d5b330edc4334065880b4c542ed5. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FRX199400488 — a six-check JSON result.
Le monde des singes (Monkeys Primate World)
Le chant des vagues - The Song of the Waves
Forêts Maya (Mayas Forests from Guatemala)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc863eea34d5bd25dd45f7c6c81978d138069a5c1caee69b6adc928f8151299. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T02:33:54Z), 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/FRX199523946 — a six-check JSON result.
Les plus beaux chants d'oiseaux - Birds Great Masters (Les grands virtuoses)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c8db63b48de673e2fd21e79382fe1d4dd5fe44e65e48fbf823a7207252d59e. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/FRX190735937 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85919449b72a4c6dc8f8f6a7b565ea33deca8fa8bb343623c2ddd14ee11430bf. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX190735951 — a six-check JSON result.
Paysages de Namibie - Namibia Soundscapes (Réserves naturelles d'Afrique)
Les voix du désert (Ambiances sonores / Sounds of the Desert)
Oiseaux des rivages marins - Sea Shore Birds
Guide sonore des oiseaux de Paris (A Sound Guide of the Birds of Paris)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190bc8e7acb84a471db448ac080047d6830cc1a7b30387438c30f26bce49fdad. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX190735389 — a six-check JSON result.
Le matin des oiseaux - A Morning of Birds (Cinq paysages sonores de l'aube)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x487d897d9fb084c2458d1555b90abc1bf51a94041d002ea89c5eb846f5f960c3. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX190731627 — a six-check JSON result.
Marines et marécages de Charente et Poitou (Géographies sonores par Francis Wargnier)
Yutajé Venezuela : Le monde perdu (El Mundo Perdido)
Oiseaux des forêts et des montagnes - Birds of the Forests and Mountains
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c89c03d939b596c859b275dc92213505cee66832ab186f4279eee5981efeb9. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX190731860 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fc7bdab6b9485c69d2e3890fbf9714a384b337d699bafbf071c7d7ce050937. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX190731862 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913b8c96bae4c6b86379f4608eb585c5d36574e6b162a981bc0e9115719e90f0. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FRX190731905 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d96b8acc82bc53a87f181edc42b1338f39338b245867ae279bdaa360fa162f. 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/FRX190731907 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7a52c815a22253cae352da2435f11dbd1351d57676c27d18e0768887bf96de. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX190731868 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0998d91f6885b1c2476fcc37f0142b400e699481283ec1f46feff83f6dfccbb. 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/FRX190731873 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cc8d19cc44dca13223c97b343c53eeab147d1e97c43fab84f2a2c2cc0ad09f. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/FRX190731891 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e3935072737b8494b50a67175130974e41c0a343fbaa801b6d682d9bf231164. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FRX190731933 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x368a994b4d96bfc43e77c0208f1fcdd5f51fa4aa1caf76fc8dfcfb8a8e921c17. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX190731897 — a six-check JSON result.
Pinsons bouvreuils - Finches and Allies & Co
Jours et nuits de Bourgogne (Géographies sonores par Francis Wargnier)
Kenya Ornithological (Expédition ornithologique)
Pèlerinage Andalou - Andalucia Pilgrimage (Flamenco & Birds Dongs in the Guadalquivir Delta)
Balades aux Antilles - Birding in the West Indies
Birds from Paris (Soundscapes from Ile de France)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81e09c40cee52d1ae5ce5488677fbfbdd825754f5c524b6b24f2d6eb15329b25. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FR6V80710113 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf091987f8d0324bc9ac0a7b13d8978702d421bd84afa544a06fa601a74ff1b9d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR6V80710121 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf7eec9b6b57b09e860a2c932e67bfefcf910a647452bde9313eba977dbd923. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/FR6V80710151 — a six-check JSON result.
Chant des quatre saisons (Guide sonore / Songs of Four Seasons)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68aafb5a75bf073b1610614f5915ed904f757cff37cecd5cd7651aedcc689d04. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRX190736549 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193dced22f789b72003bc6dacd13662242a2a7599d0aec61f44b8594ba820171. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRX190736560 — a six-check JSON result.
Le monde des dinosaures (Paysage acoustique reconstitué / Jurassic Soundscapes)
Redescente dans le temps jusqu'à la Préhistoire
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd190f5115ce42fea36c37cbce99349145b763cd1dcd452e75e85881896863ef. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/FRX190736311 — a six-check JSON result.
Les oiseaux du printemps - Birds of Spring (16 concerts naturels)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d221106ddec07930edba35bbd01c3c0c29b0cf0e0e49a341f17c49a75e370a6. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FRX190731695 — a six-check JSON result.
Les singes forestiers - Monkeys of the Forest (Le monde des singes, vol. 2)
Au pays des grenouilles (Guide sonore des amphibiens / Frog Talk)
Paysages malgaches - Soundscapes of Madagascar
Paysages canadiens - Canadian Soundscapes (Sept concerts naturels)
Drôme Concerts naturels / Natural Soundscapes
Paysages sonores de Sardaigne (Soundscapes of Sardinia)
Paysages sonores de Toscane (Soundscapes of Tuscany)
La pluie - Soundscapes of Rain (Paysages sonores)
Oiseaux du Maghreb/Birds of North-West Africa