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 0xdd54eee3076087ee5ae8477383aba59520f753a6b2461990372f189bc4689b79. 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/45c63fc7-9b89-43df-838d-c8a3c9235fb4.json and https://artists.proofprofile.net/proofs/artist/45c63fc7-9b89-43df-838d-c8a3c9235fb4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
20 ans à l'écoute de la nature (Ambiances 100% naturelles)
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 0x8a71d34cc79beb0943892499be3b1c8d5062603af465dd73075994231b33a445. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/FRE901100180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae078c6f03f214149629de2f96d36e672dc5677c4ede8ddcd94ee6ec2e642e0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRE901100150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb9af2443b30d4d47c0984c8bd60776eda165f18f6d438e3b1f1a334def672e. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FRE901100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06ac458f2a82b521a948f065743d13a1325832f5beaf1a01d2bedd62b81b70af. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/FRE901100170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0e1c5d9ab1386892a0826b4c5830c1c9eaf19d9f60464c8868bc71ff40ad3b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/FRE901100610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0771b4cb640cb99f5a56a76d472981066d731e09907a96e2e9ecb02910ed3437. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRE901100620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f13cb92dc9aef40492bd1e86614d6ddb86ab366ce90dfe14b66ae3bf8e2d23. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRE901100700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4fe7de6915d2f0885dbd9aebf42db67e249d0ec03e6ee4ecb77096f42d13f0. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/FRE901100670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78111b445a04fdbd24a7a07b742ee6b3d861ba68c3a8e7d108a8ee162fee693d. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRE901100580.
Naturophonia: Chants des grenouilles, rainettes et crapauds de France
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dce6b9ae99fe2e1230dc943de56c65aa9443cb74e2b8c6a8b64df9f4d16bea3. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRE901100260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475cedff453419342ac542d0c4e27b9f366c3021f6969278bee85ff8ea770dfb. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRE909901140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeb695ded6e4ed5672f76256444d0731fe4d2d3bb1bdcd46bcb548e0155d9d7d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FRE909700680.
Naturophonia: Ambiances de sous la terre
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dd170c2ad8e9e55882a424e78dd2ad93dbe57965124f36c860f97f90bf3059. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRE909100290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd728d0ac74a0879a7942bd38b34b1f5ffcf6b1850d4c3d19e28cc8184107ffd. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FRE909500210.
Naturophonia: Chants des sauterelles de France
Naturophonia: Marée d'équinoxe (Reverzhi)
Naturophonia: Corée du Sud, fin de l'été
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8296d3d5f7abae6f78e29db3d8a6f8bca5609ce0ed84dc09436c95ba7daa26. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRE901500260.
Naturophonia: Nouvelle-Zélande... Iles lointaines
Naturophonia: Islande, sagas des paysages
Naturophonia: Sibérie, au sud du lac Baïkal
Naturophonia: Dawn-Chorus, aubes aux oiseaux
Naturophonia: Forêts d'ici et d'ailleurs
Chorus : Hylodes à Grand Étang (Guadeloupe)
Chorus : Éveil des grillons forgerons (Guadeloupe)
Chorus : Rossignol de Siemianowka (Pologne)
J'écoute les sons de la Nature (tomes 1 & 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10729003483ce5b82dc908abdb773bff14b82881709b7970d37bf1ae6385113d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FR6V80205593.