Grégory Jean-Paul Lemarchal (13 May 1983 – 30 April 2007), known professionally as Grégory Lemarchal, was a French singer who rose to fame by winning the fourth series of the reality television show S
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 0x745b82acef746348eca72533ebbae8605da41d4de082395aae5fce43d341509d. 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/c6118eda-43bf-4111-ae47-2fdd2b4767a6.json and https://artists.proofprofile.net/proofs/artist/c6118eda-43bf-4111-ae47-2fdd2b4767a6.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 0x9c7861d1b3e35aa55e6f51470ba9d3527a4932f5baed77b39c974077ab625968. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/FRZ030502110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d746d950e2054b555428db36d0050a45ddb690f6fd201fab8cb541169578f8. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRZ030500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60bc497b93f3c78d14af31ca444b9cfe66133e62261a2795a7184bdf67888205. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/FRZ030500310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82ff0461f32655ad7487e8b10200f479ecd604b2af17568e2daffcc35868e796. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FRZ030601320.
Je suis en vie - Live à l'Olympia, Paris / 2006
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd189670cc33839653de78f53b3e3cc63c26e00aa8a7e15169f3cbfecf59c38d2. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FRZ030601340.
Aussi libre que moi - Live à l'Olympia, Paris / 2006
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8b9575e3d9a2cbbdf9a210f9d09cbfc0a236f6150a217d0c5617fd583899c0. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:56:55Z), 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/FRZ030601390.
À corps perdu - Live à l'Olympia, Paris / 2006
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17da1e3da018ef3ebcf43edeaa4764a4ca97406acfe41a411dac1c3a8832fa5a. 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/FRZ030601440.
Fais-moi un signe - Live à l'Olympia, Paris / 2006
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c26d52b5f1e95f3c7dd0a7ef30abba782037d20e7dc75c96b923c4bd35ba6c4. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:00:24Z), 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/FRZ030601450.
Nos fiançailles - Live à l'Olympia, Paris / 2006
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94acb83e61788105b15a2536d40517481843521df1aa19c245f54cbcd68c6b99. 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/FRZ030601460.
Show Must Go On - Live à l'Olympia, Paris / 2006
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386f6060f7a13375ef44228cfe5bbca4dab58a992ff0912ab62bd667212bfa51. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:08:28Z), 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/FRZ030601420.
Je t'écris - Live à l'Olympia, Paris / 2006
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8332f03f899bcec554a96eb79f6381166e97ee05740ca3696b22a827ec4b750e. 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/FRZ030601430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404c11ab657ae76498d449dff1a623f86b5a8450a17abe6b1d36f2b0cabd1207. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRUM70400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad225a1f4a4bbec22b2f6aa7aac21269ed33a790079c3276e71030a4533999f2. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRUM70400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63203b069ded59300fc0756b5a21b852da5256cdc1631b7e4bca3e1ca07a4da9. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/FRZ030500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d3c7ef06d91fd546e6b2708aa9659ac22eeca7232252d05c653e419343e477. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/FRZ030500320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca212f2cfcd5d319506f67789c6de8b20f5f2c75e576402746be796b93b28ca3. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRZ030500420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e5a2da047d5adb746249ea981f039eb6bd9d365f24826ebbc7f049053d9a56. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRUM71202737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054e77987300098007062ceddd09e2215c89f6d0187a59dea7d72f7a47509deb. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRZ030500460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d3c7ef06d91fd546e6b2708aa9659ac22eeca7232252d05c653e419343e477. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FRZ030500320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63203b069ded59300fc0756b5a21b852da5256cdc1631b7e4bca3e1ca07a4da9. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FRZ030500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f19b49b12f5e43186e5ad7503921f17f41edcfe2f1966332e292a57541ab56. 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/FRZ030500170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73a2c7c349f7971cce42643fbb5a8be1566ea60c761175c4a90f757311618cb. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/FRUM70700109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x514e288eb7dcb2c3eeb5e6af050b1d25fd2a3d1090d62eab24253ae66915c53a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T09:59:35Z), 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/FRUM70700143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d24fd30d4f20afc0333cd2853e0b31903406b213c13612a43ff40949cc32b1. 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/FRUM70700141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d01c785417efc1f2794dcb1608f421c0f4421ca1b98dd58cee2b7e41ee5d0e. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FRZ030500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca212f2cfcd5d319506f67789c6de8b20f5f2c75e576402746be796b93b28ca3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRZ030500420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15fdb90ac9b98c4df8814dbb589e84dcc57d894e5c0d62f9178abd5905e5574. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRUM70400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d4d8d86e3acbd8310c02e5933634ad93a9d0a4ba995bfbe1b66e1c3264e16c. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/FRUM70700139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2878e9482ffde45e0a28d795b2a01745818dc63bd100da3ddf98c8c7f0c6e678. 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/FRUM72001062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca212f2cfcd5d319506f67789c6de8b20f5f2c75e576402746be796b93b28ca3. 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/FRZ030500420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d3c7ef06d91fd546e6b2708aa9659ac22eeca7232252d05c653e419343e477. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FRZ030500320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad225a1f4a4bbec22b2f6aa7aac21269ed33a790079c3276e71030a4533999f2. 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/FRUM70400047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0d01c785417efc1f2794dcb1608f421c0f4421ca1b98dd58cee2b7e41ee5d0e. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/FRZ030500180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad92a3932851df4df85138866ded9559bac2b8ead26412c74c091aff446f1bb. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:16:26Z), 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/GBUM70600680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25231f7cf6ad2b8586bec3803b98589b23e7c871aa886476e2209c1d7e32a1bf. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/FRUM70400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63203b069ded59300fc0756b5a21b852da5256cdc1631b7e4bca3e1ca07a4da9. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FRZ030500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054e77987300098007062ceddd09e2215c89f6d0187a59dea7d72f7a47509deb. 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/FRZ030500460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca212f2cfcd5d319506f67789c6de8b20f5f2c75e576402746be796b93b28ca3. 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/FRZ030500420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca212f2cfcd5d319506f67789c6de8b20f5f2c75e576402746be796b93b28ca3. 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/FRZ030500420.