thumb|Grégory Turpin Grégory Turpin is a French pop singer and songwriter. He was born on July 3, 1980, in Saint-Girons, Ariège in south-western France. His three albums have contributed to the rise o
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 0xf7ba8c2c81b088e51f84d94957c9c70f4044dcff912c2be1535311d5e54cc1e9. 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/457e01dd-b59c-45d9-a3d3-e515c10e2bb8.json and https://artists.proofprofile.net/proofs/artist/457e01dd-b59c-45d9-a3d3-e515c10e2bb8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Mes racines - Les plus beaux chants chrétiens d'hier et d'aujourd'hui
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 0x7467bd9d00ca1cbd4801fd6f5660ce81593aa69f1d2176dcec7019e9910363a2. 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/FRUM71403014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3d2159dce25e9f99581dcfc360233542865a071cd7947cdb389b09d976ff91. 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/FRUM71403018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2a17a0cff01d95f0830e2fa7f7b8bb24c9b3425b8e0da8d804205f6e069c94. 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/FRV081900038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d92d5ced8587eedd6231131c1d6827d40658bc4ee673683c4ed39b46f56a073. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRV081900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b2d0d8e76780980183fda0e0fe550ca6b7dd410fcd627c1f1c91177e542b37. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/FRV081900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae0bf32f2455ba1fb6793416d2030c5740984ce661aeaacbe09c6059c9e16785. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/FRV081900044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860734c84d70047b2171ae3dc1baf38c7622f51ca46cafc1f0d149c565f2b531. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/FRV082300011.
Aimer c'est tout donner - Edition Collector
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf912a878d976c451d41af9550cbaccea059a0c809cfa102a6d8ed7317b41fd12. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/FRUM71801593.
Aimer c'est tout donner - Thérèse de Lisieux
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf912a878d976c451d41af9550cbaccea059a0c809cfa102a6d8ed7317b41fd12. 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/FRUM71801593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa52811c5e0dfae12df7051300a58c000abf8337ccf4981e61b1ee4163df5de. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FRUM71802041.
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