Fekir may refer to: Nabil Fekir (born 1993), French professional footballer Yassin Fekir (born 1997), French professional footballer See also Fakir
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 0xb97a88a8d6f766d2d88cdb185f5a5d6c993861392078dac53e088c9a3f1222b5. 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/d70fd153-d2cb-46b3-bf21-5ae39ee16209.json and https://artists.proofprofile.net/proofs/artist/d70fd153-d2cb-46b3-bf21-5ae39ee16209.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 0x7b025ec2f532779dd8b38160fa48a7df73cb952d425a611c7af8f55e0a79b7c2. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/PLC062232686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x121a70cfa3ad4e5dd73d72d71837b1fdab6cbb433239e038fa74429d3fb84c13. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/PLC062234462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1119971b8275603fb397a6d0dfea24f37099667c8c0eab3874baf23f3f704f. 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/PLC062237559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a55fc7dec608bccf6b009971be847b3c2e903ae6487e9f05a28ab8e73b174e6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/PLC062239262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf207a55079ceabc8c6604d6820c6731eeee4959f2c9fb110b6676a08325620f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/PLC062242198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf910ab9ae3fa4ef087287c700362aba351c8b7c618f2f009bd9bbe6cb5300758. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/PLC062247753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12834fac3175a1a56fde1e35e0dd46f10615a73e944d50ef6c3a09046920199e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/PLC062255566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3593d6d2a04d6e7067abe831b09636a99bb7afa91f0071110335ca09a32f7971. 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/PLA552400651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefde8476af3f5069c9b0d5f06d779b7119e2b316ea077e35e3b3d843c6c30bef. 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/PLA552400635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840797ca7ea1fd8ae40099e3ce7408385d70b4931069bd3e6b586215399e833b. 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/PLA552400653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343e9c89c15753ba07e436748da27529474073bd1fddd2228c2c2bf0c2a0d439. 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/PLA552400637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2e4575b33fb411be7a143405f16c331baf66067053fcbe04f77a6e9f8938c2f. 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/PLC062231626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b37439912fa107ca8d53f84e56f2a9905bd571fd9b8a4213b043d90ca94c2ce. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/PLC062231629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875ca853fef8db09cfbbb1c6fa09c9eaaab5deda7ca3d25f279813664b782f53. 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/PL2DY2301609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3826e1dd5fca58975a59984b248830956a89aae810b4521a549e91ce86f4215b. 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/PLC062423566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343e9c89c15753ba07e436748da27529474073bd1fddd2228c2c2bf0c2a0d439. 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/PLA552400637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd5bf45fa33171c3ea3126578af4941df950caebc49a1510bc2e3cf960deb7ee. 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/PLA552400672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a18f027487a2bef9e41cf6caf3858b346c11efca3f36f7452d92be35426f5ae. 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/PLA552400676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dfea477841c1990f7d8fc16bd7fe7fa4005df94343523d93d18388f8937f2ef. 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/PLA552400683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc362f10241e6cc75f12c4c22efd1206eafa4d61b062cb098a7f67b62a340f6e. 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/PL89B2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65d7902c07729f492b3b125e9a792259c4d150c8daca5c604324289c78db812. 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/PL2DY2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefde8476af3f5069c9b0d5f06d779b7119e2b316ea077e35e3b3d843c6c30bef. 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/PLA552400635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0ebecde035102278703d9d60df66a5a70e6d60ff71f7c0d33cb8281b863311. 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/QZES82382203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe17156066ed34d9867226d5a16babc0cfda69e4b22d4e1dd4ed8aa80d899348e. 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/PL3B02300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0d4e4060cf1721c6eef15a1674367524e7ab64cec7998cf2407add4a7635b4. 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/QZNWQ2172871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b7027e8f56a7fb185656751f8e90483c893bdca4a40068556b00eb6fd8c1ff. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/QZWFM2310120.