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 0xec7821a77607d216007fd6c5337af0c75edb49e2478a92d36e9e03e2d744d0b2. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/05f87ff1-9953-4ecf-9261-a604a9acff3d.json and https://artists.proofprofile.net/proofs/artist/05f87ff1-9953-4ecf-9261-a604a9acff3d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3fbcb31cd5fbdc25508780f292507f23803407c9cae9c860bf51a61b924cdf. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAFI2185822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4c1f693173a7c0a92ffc1074167c3d9d9f386d79844b85232d8b7ed35b0e4b. 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/FR2X42228315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5b5ce9996e5e38395806839f4f008085114df60bd30d97f52016c70d622ce6. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:51:04Z), 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/FR2X42228316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46413e8b0e15f3c62de717d28ba3cf254fd7c1d2a0a8e11efa67cf6967af66b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR2X42228318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6f7249ac86936a13be040eb50b2dd227604e4a8231b3845e4cbc6c0e9e9c52. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:25:25Z), 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/FR2X42228319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5711958e7d10b46533e2cc014c9747e29b71d5b450b28a7e66d1420fa421087. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FR2X42228320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2253da804feed867954e48537aedf1a5e4dec285b2b34894ad0aa79d4fdb9844. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/FR2X42228323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4103fa1d8d3ef531893615e737a4c0b8d1f6f5e1cf4b014ca4570ef9c3d71799. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:50:00Z), 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/FR2X42228325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67ea58e03a326f684b3e2a40a063fdf51fe6b01e748c8fc078b3ad708a51185. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/TCAHR2383341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb1753b7f25ccd61661353664c7abd28d911c04ee614b990bcd57b4f9d0cec5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:36:18Z), 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/FR9W12519026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff07356527f417840a522ffb6a4973016811ae9c9fa69a4e918f55de8428c563. 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/FR9W12519027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bdab76ab507b8cf83a3213a02abd7a82a2af2ec30547ac22c8e6d53394f106. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:29:30Z), 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/FR9W12519028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe85dff95f0e3e939cded3248791c1705f97c2d7ffc44efb9d36a21b479d4200a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:29:36Z), 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/FR9W12519029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd92c52163bf40136293d48ebbf4e592fcc98c3ca612649b287bfa515c5470f79. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:52:03Z), 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/FR9W12519031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19d7a743c153862cceef8b47782398ddf8ac1dfbfb88e63751176381aaa28e3. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:38:17Z), 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/FR9W12519033.
Jaja la Brestoise - la nifleuse du Finistère
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33805209f9881998439e824e16a3908003279e6fceb4c848e74260a7bccd400. 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/FR9W12519036.