Les Ogres de Barback (sometimes known just as Les Ogres) is a French musical group formed in 1994 by two brothers and two sisters: Fred, Sam, and the twins Alice and Mathilde Burguière. They all are m
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 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 0x8179fb94c03809b4394a2399e31280b8dedc81d8109f049a7e0ffcfd4e1a767d. 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/9cacf802-535f-46e3-ba00-440e806cb4ea.json and https://artists.proofprofile.net/proofs/artist/9cacf802-535f-46e3-ba00-440e806cb4ea.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 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 0xbd6270639c85c7b105ff3753497c5707d451ea741db830ec0359500d02ea7f9b. 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/FRP401700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877477f4f53970bffa11994bc4816242f994205773ff8356bcfed28d8e1de620. 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/FRP401700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278ea024970711972029ccc9d4cf61c54828f0d1c206dc2d67de32380e63b4ac. 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/FRP401700030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c1696f24d30d1092cfddb7d6f2f2fb204cd53502dd87a88863b3be17add223a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/FRP401700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7d8af42ddd7da663cae8b0ec6a7f4e1867b2dc9358ac53ed5095b2f10f419b. 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/FRP401700050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b79466cc7749b12a066240a78a18ffdfd608011d50ed0241e75c6ba73bf083e. 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/FRP401700060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b368a92fc70dd6d6edd2edf829f37c8000c6489d265da9ab7fb15e31f488852. 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/FRP401700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ff4d7cf9d4ea632d6d9170e6e50a3103623f207dceabf1e1ad31af4df21bf3. 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/FRP401700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebf3264630ab0d0dbf5f858803952efa63f610a0dea54fb5d6075444f6f0988. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRP401700090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec18eae2540371d7dde266d63dd02ab8249c6e3fa0b04d2aa8f881ef2cf32cd. 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/FRP401700100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346047f76a995b78a20b584a1113e1bc8bfa5b892e5845d89b0be6a88c6a5947. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/FRP401700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59595de00773b7002345f9bdaf09d50270e04cd67c5db9ea0f1513a0f6591188. 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/FRP401700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887c4bf62c5e8ad14573930b4b43c7c3c2b0d39c99d35cf3b97199f766dfea57. 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/FRP401700130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8d3d266e222bb3c14448434ad1dfa9192e15f4f3ca59a32e73d9f0807ab064. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/FRP401700140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155d30725a9550a4a6ff092f5725f58afb72918be3f51c272b1b6bcd72e699be. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRP401700600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5d250017ef939960baad8a315d74f587b8fff91d9b9ba0346fc00c1e043335. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRP401700610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7283495d95b845118a0fd4cac00ebf2de646639d210e29ea21a48151b5d42941. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/FRP401700620.
Latchoska / Dos miné / Lo rainal e lo merle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe858dcf3e16476cd06daa768b05b3c62934f53a7c2fc492b71568686b7a84c58. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/FRP401700630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8d007a997efe3f2b61dfdeea8253083a2e80cb3940e278319bac83a8dc68bd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRP401700640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52208edbe857b51985b85cd7822cb15e38eb2f52a931a5ad9ba79c72f0377bc7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRP401700650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c805ae8b3897d8b7d0d91fa21ea76446e55b2584decc6e24a4de8f3887c4ee2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FRP401700660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6be0cbb9a2e45223cd95ab0e541998bb40b6a7422f8af0bf9b072aa57c8649c. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FRP401700670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90bf7a3ad2a452435bcc366168c660333b4872ca3536801d28de7c2f6875a800. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRP401700680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3f9cba1024a926e7eb20df31077873f313b437f46cbb9bd25570778b5cd623. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/FRP401700690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5f859b12140070a6ca0c58dcd0bd3b143a6a75cc1f4361b9bdc13d907e9163. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRP401700700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54329d70a089769c6d580ea86a15f8edb4168dbb649338abd8d67573685867c2. 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/FRP401700710.