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 0x911cc9c3fc6cf4d28ff6bb62fcedf826358ac1c5eb2ef77692df61f48957c23e. Chain 2 (Bitcoin): anchored in block 953638 (2026-06-14T13:10:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3948df9d-a014-4266-ae9f-9079e8c3fd64.json and https://artists.proofprofile.net/proofs/artist/3948df9d-a014-4266-ae9f-9079e8c3fd64.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Les Affranchis (feat. Shurik’n, Elams & Manny)
Les Affranchis (feat. Shurik'n, Elams & Manny)
Matrix (feat. Le Rat Luciano & TK & Costello)
Les Prédateurs (feat. Naps & Hollis & Solda)
Les Prédateurs (feat. Naps, Hollis L’Infâme & Solda)
Les Prédateurs - feat. Naps, Hollis L’Infâme & Solda
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 0xffa48d430c97697e40b0b4c74bdeb1a6c022b3c94952887289451eb53f8d0337. 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/FR8Y72300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aefccaf529aa6e7f322d2f4c55bd8e9ebc00e0c8a767eeb21223f819c3415f3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8Y72300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c249ac4cbb0fad7dcfaf666e263ccfe971a9c1f0198a42596c6d6eedaf2011b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR8Y72300154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f1d8d9fcf3fa9162a7bc3740e418d63c3020c886461ff0712e98040fd405b4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8Y72300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cec8afd6f74194b564af0c24b117aeae57b788a7a2cc9555b972935a45a0ca5. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8Y72300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa48d430c97697e40b0b4c74bdeb1a6c022b3c94952887289451eb53f8d0337. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8Y72300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c249ac4cbb0fad7dcfaf666e263ccfe971a9c1f0198a42596c6d6eedaf2011b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8Y72300154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aefccaf529aa6e7f322d2f4c55bd8e9ebc00e0c8a767eeb21223f819c3415f3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8Y72300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e65a30cb8f43cfd296c9bbc9c92d7d8f0480a056cfa1137506def7f53324fab. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8Y72300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254edbe8ee3af9d7f1c38f6d9b9c3d7117cb1b7eb9bc3e115ca544c634754702. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR8Y72300157.