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 0xcdb92cc34c177b4a8eacc527cf76a620a1155367a9f6d2648487bcf255f7481e. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/86997431-4ca4-4a82-a571-df297302f549.json and https://artists.proofprofile.net/proofs/artist/86997431-4ca4-4a82-a571-df297302f549.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 0xc97a29f67afba1438208cf4ae8bc15cb69a4eab39f4ef20d170db6c851676952. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FR9W12333639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16527684271a269c0bfbf53657f215713784001e3d923a3d90ae56ef493ddfcc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR9W12333640.
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 0xf8f69c1fb9ecf1c48787ceab33aa742270f69b4c4b79dda4212c9241011f5883. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR9W12333706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9d36829f646822930e598eaa5cba2590f4180c7955453622a14ca22cfcca46. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/FR9W12333641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5153560810bbf85ae3c6e30181a29a4061a7d7ad6c1a7d9c119042d7b21679b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR9W12364525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb557f9b0561a18151b402bebb400de2be53056ec70d3fde6aba607ab64bea9. 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/FR9W12303491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd24ef7614210165a164f60cb7579de85bf12f310f6db37f61e848ee39ff61c4c. 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/FRZ052000249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b9a069124d545e8582c372b35ba6b639b8301a4e8d17abbfa722e4ac1fbac0. 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/FRZ052000284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358c03665e23b090c1f3868c785b1101fb82e329c0b0ec9f663ea9380da9ca2c. 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/FRZ052000285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1db24ab5d2aa904cd44ca27e020c612168803abf5411ef2b6a38a383620654. 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/FRZ052000300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a78feea0831ca8e4214173ce81dce85da3b7e289df9372362c29c66ca6ddf4b. 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/FRZ052000301.
L'île au lendemain (feat. Clara Luciani)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde37b74434396a26463d2b036a6ab3707d0ce7b919c67008cb2daca55d26e6e0. 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/FRZ052000302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc580d63ca7a8c92e956dd6ca598a9aee8858c82dec6c3143d764a4795087dbe. 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/FRZ052000303.
Bla-bla-bla (feat. Caballero & JeanJass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0de7599992d5e5df78b61ef9b7293ed7a2a5152666b6dd5ed3e65194c21032. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ052000304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3b7cade6861040973e99f4ff80c70a13228433fa04ed343c51607570255be1. 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/FRZ052000305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c80b177e92070ea7f2b583c80676bd23385f9a5ecd68f163b99aa00a281b24. 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/FRZ052000306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9b75131cacd5751c7c2314a8ba2fcd1531097930fe6ea3b53ac2e047ba3ebd. 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/FRZ052000307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39888b01da92e340de5b979411775636a9240114dfac9b642149573af765761d. 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/FRZ052100364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c5c0e7f887239c5ab55536de67f6a26a7f30fbd48b6dfb416d9da3c1839a3c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ052100361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35bace92a8a57f68270257b8d334af6d6cf4891c14a50fe7344fa05671a682ce. 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/FRZ052100360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819c214ab390e6bb9928ca4151e3df0353dcef31ba9a77b3d88fde4180cbd14a. 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/FRZ052100362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a732edd4dae24342976bca659f99f54b0c3649ca28a49ef4bf9951220e8ab9. 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/FRZ052100365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f162b4ecaf81acc2f6c2b07ad63c8b46f27cd50cd77812923189816483dff9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FRZ052100366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5b376e0cbb969e5b201b7503856f4dfefa2368518f0c97c3ebc96c626741e3. 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/FRZ052100368.
L'île au lendemain (feat. Clara Luciani) - Acoustique
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c637303c3aff02be8047761a054f46d6847ef220907517f6d31f88b3588b959. 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/FRZ052100065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63fe1d9a7c547e8afb2b9473e7db9c672f47c5db32a9e6c71a786f2c8761fae. 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/FRZ052100367.