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 0x754f39f2aae3498ba892d976c26dd707fad4b04ed62ca17208a68fe879f34439. 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/fb8a35c5-e20c-4dd3-8a24-62da3241b1d9.json and https://artists.proofprofile.net/proofs/artist/fb8a35c5-e20c-4dd3-8a24-62da3241b1d9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
En faisant de l'art (Extrait de la Bande Originale du film « Les Déguns 2 »)
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 0x078b5135b526aa56c6bf219483ff80defa34ab8155a41faf8c75c0e0b808ccd4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRERF2500210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0381d3c3ba95c4ef8d831e7131b4d2f7788c5f2eb6416fd0bd75a3bb8796b9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:27:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRDDV2500030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530e8888092fce6c8713abbb1cb37f37ff724713dbaf92e47a6880aaf6a4cd89. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRDDV2500050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04905dc4a69aedaca78a836767a3a381462d9b550e7895d7ec936fd3bcd06503. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRDDV2500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb4e4ed1cc165ebe26fdb7dfe8ab486880691e43de9f552a45684b42bf1b28e. 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/FRDDV2500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e66c5f16e170207d8ccf0fc509fdffe9d8dc1c57b3d7302a31e3647e2e7c2e. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/FRDDV2500110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5dc64fbbccf07774d95607d9b3f4499cfcad9082ee85c916bb3e1204065ee8e. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRDDV2400300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7091923ae7df5a7639ba4a1f44493b1c77fd58a3e8e14a51c89efce299391a46. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRDDV2500130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa92e8d5f3b60cf746600430233120356be59dade3fb54893767603f6f34b471. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FRDDV2500150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44bb745873b49075d509383a0b28d6b363483d145013c92bc6903828dd3229c. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRDDV2300450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4941c074f5477448bc80d7c189155d9243f3b4ee24c581c08d4fb61c9ab6cf4d. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FRDDV2400140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e4ce4e870bda7e8b03b974dd04c9a980a03fc12c69b0d69850b132d54de9ab. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRERF2500570.