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 0xf8626dff5c067a03372135869a9d70b369d431fed335a0a7ec0b5fbad36d3c56. 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/3a882e65-6ead-4781-8218-17734f06acd7.json and https://artists.proofprofile.net/proofs/artist/3a882e65-6ead-4781-8218-17734f06acd7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Une compilation de légende (Disque officiel du Racing Club de Lens)
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 0x4ea389b64ffb7345bf8fd05010e3f722926f80362fe25bbc2cc331cbd8fa64d7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR4DZ0800810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2b39afa9289bcb1b2e78cd348cf5c07e209bc3058945aebe30b90043085af0. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FR4DZ0800830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8288c6ba4d9ef9b999c6af4b5599d0baba46a465584cf63e8eb4824dee72f7b. 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/FR4DZ0800840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d574989dca14ca22faace78c4ef6b3fba95c99e70248ccfda75549b0edbdea. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FR4DZ0800860.
Fou d'Bollaert (Disque officiel du Racing Club de Lens)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f73ef155b9fa86b51b99e8c629eb15bcc586f28a2ed9a17344944288157d91. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR6V80927489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aba48a125b2101e5f5ce0a2dfaf25a32fda64a444497b56d2092544adbb63e5. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T04:19:12Z), 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/FR2X41689048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b48ee2589dabc8b7afab0504d394d788cf1d9c6675c198ac81528b92ec7b3a5. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:55:55Z), 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/FR2X41689050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406b3a659abc4f3de3cc9b821df093d4f02f71db1548e3ed06ad88ed5600e130. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/FR2X41689051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3634ab12e9dc1479aa4bbd66a7b838615dd49a89f88bcd6a9d525177a709a825. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR2X41689052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a7f99886b681d365cd8a713fff21a1b0579f164428db395f9ab3031a256f00. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/FRX282074937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1585fefde534cb203ad6b5f990a24a38d148a97ffde5042b0e93bb615340601f. 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/FRX282074944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a834999e56fbd41e1e1a27537d725f49f878c2d41b516efdebfe33d19266ae. 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/FRX282074946.