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 0x4993e538e345bee47efe585c0a149cb18b52d130a211cb402ba8c72c6854ed8a. 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/812d0f8f-4335-4005-9ae0-cb1cf5ee70d5.json and https://artists.proofprofile.net/proofs/artist/812d0f8f-4335-4005-9ae0-cb1cf5ee70d5.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 0xf0ee49b1679beb41f07eecff3680177d09b4659f4bd26f2be8165e529a46453f. 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/FR9W12301141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18decfd2a56d46f52757835573538d1b299e4d933b3b315df6ab740c47f22f7f. 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/TCACN1680895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e08e1b13115085cd10c4cacfee69da219d201dbecd2f0e77cdb9f1ada3ac0c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCACN1680898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e926d79dfb00f27f11b0c40b8e454b6abf7f6c01a988d0979fd412683aaedf. 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/TCACN1680902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc05bdd7b12b2e9eddaa4f6e7778b6c5696f34bdd8e95a4ae4336072a125eb04. 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/TCACN1680907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe5c12c1b146c0131099cac88d225b7cd6ac6d20ef38fffd1ca387d680e5c88. 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/FRUM71102138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a55ea012817e7d3940677ac485edfa17876cd8c8f4189e5dbe39e1315efd6d2. 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/FRUM71102154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3b469a973160b079c0ca4265d835b5b7837318c63d5bb2fcc130644eba174e. 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/FR8FB2400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901e4e92ff11e89b3574aaa49bb8a2bf852ba41b2da5bc9e446837f1846372b4. 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/FRUM71303312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa84483e3becb66509118571517c5b7c4a93e4acedbfd99e3fcf1646c1ab53c0c. 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/FR6V81238713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0abdd48874b6888bca6ce3461d2753742e86b7b7a9626bd7b77fe75050e3eb6. 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/FR6V81238718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea73d85843c2de1054a1165d6cf78bc488c1cc258b5137b94345b5a787cfd85. 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/FR6V81238720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f2ab6d5091fb267c428588acd514abaecae161afd94195524fdfe589b6f85d. 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/FR6V81238722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc05d3ddaf03a86093f158351a7297e994c4a373c9e6fffe74509d30836bc47d. 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/FRZ010501000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830319baaa572779c6b89348b28163dae468e48a15148ca46bee074b66ebe381. 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/FRZ010501040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e747a8159f3d121a6cf867f30edc3ce4125892c7cdb605c8ed0ae1de583f6e0. 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/FRZ010202540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ebfac7bde455debd0fff7f863ee5b047ce719e312ab6122cc8204c5d61a842. 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/FRZ010202500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99869422894ba680fd5e4ef3c18d56392a9e9c82b5e12b7f83bb6920854214bd. 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/FRZ010202530.
Jetaimejetaimejetaime (Extrait de la Bande Originale du film ''Quand je serai petit'')