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 0x56b66138c6db1fdfb91e165e5871423e0b3eef10d41005196437c3906430192f. 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/5402f6d8-f96a-4fa1-b4f1-ce50dba33f12.json and https://artists.proofprofile.net/proofs/artist/5402f6d8-f96a-4fa1-b4f1-ce50dba33f12.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 0x99ac21800133e485f1f0d0f0d8148996b6d1518fbe38952765adb5a3dd90bdba. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/FR9W12217513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3462339efa8a02c3b0a56b3f47100ce2cfac2aefb6c04a505140a0682defea4. 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/FR9W12213395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2103ce8790dedb806bcdc211ab78a21d6ca13eabe23abdf02b369bf1eefec6. 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/FR9W12224849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf818f8eb8db2bfa43c8332fec81fc8cbb135332a52f087b6783110d78e348c2. 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/FR9W12251301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda771b56d619ea46edcf5ed4c4fe0ddefc57763eafc2faf87728424d1deb3937. 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/FR9W12251308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x903a69201e80a80960e20b48fd73ef4df4272732d9a86ccd4d68d6c5b50050cf. 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/FR9W12330425.
Ce qu'il restera de nous (et plus encore)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf818f8eb8db2bfa43c8332fec81fc8cbb135332a52f087b6783110d78e348c2. 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/FR9W12251301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eb88555a1614fab96057fc9c97423a83ed63266203e2f98ea2da8380d7e5719. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FR9W12251302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99ac21800133e485f1f0d0f0d8148996b6d1518fbe38952765adb5a3dd90bdba. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR9W12217513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60850bf16cb51e781b716eaccf153e8f62f9d71b89a21e8b72ffd66d715b53e4. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/FR9W12251303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b93cb75e8b9eddb3d2b65207bef03ba47218985748e12d0047fe16ba10d71b. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/FR9W12251304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e594b500e3b3dc3d3c3d1158bf1b6d39b1508e0852a5955ae8a5b1fe295bcd. 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/FR9W12251305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ef1529c59fbd786600f5b9436f72f5674c6b233464357c4ad58ebf2829d216. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/FR9W12251306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2103ce8790dedb806bcdc211ab78a21d6ca13eabe23abdf02b369bf1eefec6. 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/FR9W12224849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c13e18917af57637ff8e3c78bddd71ba4e9f7ae21ea83450fe1861ab90663f. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/FR9W12251307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda771b56d619ea46edcf5ed4c4fe0ddefc57763eafc2faf87728424d1deb3937. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR9W12251308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55c28b961943850ac610212bbfb5a523f40c4c4bf7dc3274bdc8879e47f84a4. 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/FR9W12218042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc90e4aadd294b5637f0eab1e5f1d8ca4c3d78de9bed65f2bbfd8980ff48ae21. 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/FR9W12242284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d6487ef0f331e578fdc8f5ee53606366cee217ef740b4e23c408e3402f01be. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR9W12251309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b051c9fa5cdd940a05cb0c89cc5f55809fc3e2a62636df534503692abc275f. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T08:17:14Z), 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/FR9W12334622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e7322df4c311b089a54c1eb0e9978a342ef8bf11b1566e6f34e257204214b5. 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/FR9W12425219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1b87be7d2b1492824f7dc3de9076bb748e36248e5205b02134a72241081c75. 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/FR9W12434785.
Homme (feat. Barbara Pravi, Camille, Clou, Emily Loizeau, La Chica, Laura Cahen, Nach, Poppy Fusée & L (Raphaële Lannadère))
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57e7322df4c311b089a54c1eb0e9978a342ef8bf11b1566e6f34e257204214b5. 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/FR9W12425219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1b87be7d2b1492824f7dc3de9076bb748e36248e5205b02134a72241081c75. 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/FR9W12434785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f62f006f5c86e6e8d0a17dd1593ecaf785586e896888e97e03a57a6532bfded. 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/FR9W12434787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4432a6ba80acbafed9ece532cc5accda4e06fe77236f992aca7ede65a9a07195. 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/FR9W12434786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67bbc36080c841a3d4c5a2b353e805450797cfaa68cb79c8c2839743ee01131b. 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/FR9W12439088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43298176960c2240aef3b88bca48cef366c512745919304267bb12ca3d356df5. 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/FR9W12439086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90386ef784c8967645e76b96e42b022c737535ee75ed7f68cc7d2cd70ed42a0. 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/FR9W12434789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac5932f95fb0b32a980578e6cca3524b13d1a0756a3417801b09715e804dece. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/FR9W12527675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2103ce8790dedb806bcdc211ab78a21d6ca13eabe23abdf02b369bf1eefec6. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/FR9W12224849.