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 0x37d487eac1965015b9139232fefbb3cea5f34727651da7189c6772ad40d989a2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fd88f723-0543-42ea-a772-b1c7156a53aa.json and https://artists.proofprofile.net/proofs/artist/fd88f723-0543-42ea-a772-b1c7156a53aa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Le restaurant des amis, Pt. 1 : Au rendez-vous des amis
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 0xd64f6ee74ba776a179a45030ef3959039e8e4df06660969db0329fc684bd43b8. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T06:32:23Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12205198.
Le restaurant des amis, Pt. 2 : Un loup aux fourneaux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7edb9060285751b57c3d06c6a677a7f921b6423b75b7d4b3d448ee74d3fc8e. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:46Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12205199.
Petite Taupe et l'aventure du Grand Nord, Pt.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc34f965f2d2d0876b24e66fb2d93bb6e4fea96c0ad381ac2022e2049056765cd. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/FR9W12351378.
Petite Taupe et l'aventure du Grand Nord, Pt.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b976fece54b491d98239fe5c8d449a883b38bcac0186e617e1f4695f01ceac0. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR9W12351379.
Petite Taupe, l'exposition de la forêt, Pt.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930e431a5f60ac3098489535a6226b92273da7d999634327b72f0c7f406b2023. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:58Z), 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/FR9W12410048.
Petite Taupe, l'exposition de la forêt, Pt.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92bc7a16b01fdd7afc329e9bbbbec62b4aeb88b3c3cbbb0ba53d39a09662a72. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:17:01Z), 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/FR9W12410049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1581c28a98cfce7cbccf9386c354aa974f213ed858299c7fd77406135a8e1411. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:54:39Z), 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/FR9W12445545.
Petite Taupe et le concours de châteaux de sable
Petite Taupe et le concours de châteaux de sable, Pt.2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c9976bff1f3b3996d34f60568488ada138127323d2e50cee223243ed39ea10. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:37:44Z), 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/FR9W12515726.
Petite Taupe et la lettre mystérieuse, Pt.1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aeb366b69a570704448d46e4a1cf29a6780ca546a2ed832aeff1d6b3fb09752. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FR9W12552506.