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 0x42b6bfcbb1ba3c1db89a7dd4610c7989b0e2716a6c07b2a8943b684c0d1b7df9. 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/a3b84b7d-bd70-4ec8-a5b4-e154552e29a2.json and https://artists.proofprofile.net/proofs/artist/a3b84b7d-bd70-4ec8-a5b4-e154552e29a2.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xacee3480f1898f319edf13f2fb2f6b213f9a850180c58fbdf5e7055546e84247. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FRZ081300091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacee3480f1898f319edf13f2fb2f6b213f9a850180c58fbdf5e7055546e84247. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/FRZ081300091.
Avoir sans être (version duo acoustique)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7efbef5fd446b1cbd364463f1856d86638712fc0b81782384ba1a5d53adf4032. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRZ051500119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe641e6be1f91046d0ac3ea7340ca9b6db3f55cdcf41229b60b3481a9434071b. 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/FRZ051700285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728b4409fc162379dcd1ce448e7034649cec9b4a7ff48706517d5978f319520f. Chain 2 (Bitcoin): anchored in block 958682 (2026-07-19T06:17:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FRZ051700299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78df783dc7407b504c004188671a8374e0c123714652bb07fdcab226bc0fea86. 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/FRZ051700293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6343b27ef69f59f3cb393cf12c0288d491590d005267fc269a467ae47fae89fc. 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/FRZ051700297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3b6a85b2e5f75dfc9b5750bb06736c454e15f953e1dc4e506fe7574b2b0856. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/FRZ051800687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5438cd76aecae366bc1a151e33f599422987de8abbd03fa5e13d0b439319db30. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR1T32103060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94321f8012e8ba0233538b6c24fb42c204ae055230f8c53f4b8cd9b4075e06d8. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FR1T32103010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9bc3853733347160ff9e0b44654d4dd55593e4080ca1aa9b43253e793dcfb5. 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/FR1T32103040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585085dc57e7ac26890ff03bb961d058f8d71f045a58beecb8780b0390682836. 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/FR1T32103050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64103dff91152324397ec3c580abfaa25606540d6fa3f026744e7767b610a938. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRIDO2011812.
Vole (2 générations chantent pour la 3ème)
Vole (2 générations chantent pour la 3ème) - Single
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea3acad63540988e206debc358526b7349f1f38b87dd5debe9b1bc910a6713c. 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/FR1A91501633.