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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 0xff4b69e7809ba8b1093b14df5a50fe2e748196bfc79fe9dcb6a0524217507516. 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/32c96977-61c7-4769-aa38-98d4fabd6a42.json and https://artists.proofprofile.net/proofs/artist/32c96977-61c7-4769-aa38-98d4fabd6a42.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 0x324be811d7cf50ec8b3d3a9a691e1fbfcbd01dad425a96380ba87023a25710db. 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/FRZ080800033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493eb213abb8ad21924966cf51854da729537a586d6c6cc92fe2ea4666a614f4. 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/FR8U00900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4156f53aa9f989ae0dda4a9a100455403a711d89d7041e75068e052f636a4368. 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/FRZ080201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b0accf207b0cb39f7f52cabead6357f0f15aeded5da693f01451cc6cbcdf5a. 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/FRZ080201020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ada9b0cd59cc27650ef4d2a58986971c85c121fbe33351e770411e37e069f5. 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/FRZ080201040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2942eec06ffe93d27f09a0e9ccdf9cc85c62ea4783a792dad1f0ba30d7c82dc. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:07Z), 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/FRZ080201050.
Nous contre eux II (feat. Rohff & Le Rat Luciano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed277380909efbbb87db783f3ede26b7cb38ba53ed007d92b34853ab10089667. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRZ080201100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e41b2209c59c81cf0e57eb7ebcc7a2752c905d4d174b299d648eece6c4df0d. 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/FRZ080201110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512f8f2c1d78443c1825b6ba89edb990dfc9abaf1fc60691e1a03ed369aa2160. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DGA072469537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f97d68b335150826b0231304e9eb7a955d0e08b49993aa09c3fdc12b8f2db2f. 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/FR9W12215333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5cbead3ffc5878d75f8bd70045fb3744d81fd58f8b8f89ea78b21b093d0786. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR0U92000137.
Plus que de la musique (feat. Akhenaton & Soprano) [radio edit]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2462b555aa8b4377b05216c6cb67e99d110a4ccd212a80f4b1fe057f47afe8c7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRZ080003650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b087a4e790375bd0a13790d97d7e0e6905b83af451c2fd6b128927fd33b381. 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/FRX762125244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3f6866762e3eb493ddc5449f4a0f00804a286316c0942d18793eee83e31a57. 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/FR0U92000135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4e27bde93f57bf9332a0de109ff3e14fbcfdfca9f10273fc492a03b1905ade. 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/FRX762127522.