Réginald Charles Gagnon (7 January 1949 – 29 May 2024), known professionally as Cayouche, was a Canadian singer and songwriter of Acadian descent. He is credited with creating Acadian French country 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 0x251dbd3305edf229011acf6e7ca92d137eecce13043123e26067f97c369bb8a0. 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/2cb39c91-1732-42a0-833a-f97776945458.json and https://artists.proofprofile.net/proofs/artist/2cb39c91-1732-42a0-833a-f97776945458.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 0xc52e915f5ea647334fd3f022b41b98c31cd2ade6d404a80da7771c9c841ed8db. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/CAZ700802762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b1d15e47d9fcef5a8510c869c39397b410df7c608ba3fbed789e5e66cbb3ca. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/CAZ700802763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81706dbadb14d89652c816df391f778db08e492cc8a1930e9b980cd3c39fff82. 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/CAZ700802766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a5d819a1ba0faab7c29db658681202843a21f76a255cef613ba1c10d9823e4. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/CAZ700802769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f38d3f801bf157f8b85bcf0e734b306303555b637519f1ec173afc0e7372cd. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/CAZ700802770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2db6ba87e1db25a8e296e853a604af81b2fdac0bf025a01b30bd713ab3c7a5d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/CAZ700803025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c531e9c87ab84fc840f22b37e3c14676978f4458a9448e3bed626161d2dfee. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/CAZ700803026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e58887fff14d677e83220b0c75d2f7c8564553ae4a149dbaa34d1051260b2d. 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/CAZ700803030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81a3eb5ff797637ae2f92f6c9045eaeee1caa2ab2a9feeba3be287641787ba5. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/CAZ700803031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3167f12924a438989f9dfad645561896d991eb6443a8d750e6038020492ce881. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/CAZ700803032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd3110a121445599a7e553944609bc0c3b48becda581346b7466024995942144. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CAZ701002234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2b8bf64298dcfa0e01a51d871c5a59b685cee699e3be6641cbe6da647f0921. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CAZ701002235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658a59a8642af5c7fc43534e70f42139c5a5096622ba72a3953429ae5bd32e12. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CAZ701002241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4fe569d579e386a34b80ea5824e4b03962dcd77fbab8f69172ef4f6df84b13. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CAZ701002243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96db055e287e261c1574cdf835294c82c6a70a04a7ea61358311307ec7e9577d. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/CAZ701002247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17411adec3c057621a1a6cb27b24399462110bc98fbc2c50e2c4aa465354b8a8. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/CAZ701002201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8d4e3ccf3dea7ada843d4a77d39359869c1462b47c144e9e3831e39d3edbd1. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/CAZ701002205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd03497a2b96ecae7527b45ae868a69f098d77f546d035c6593cadfcfa052f3. 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/CAZ701002206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fde537e2c2972a0e8ca4f2efea5c1f5402627381d54396c9e717c54c96c3b6c. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CAZ701002207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7523a0b28be246d2d3d22e66d5eba90671f0443884a919fe9ba43b366d82e381. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/CAZ701002208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb97be9a6614ca4f9d03184fd2472cf03220ac47faec1f2227bc5d9a0e5ce65. Chain 2 (Bitcoin): anchored in block 958678 (2026-07-19T05:59:57Z), 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/CAZ701002209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3b5dafbbb9e85da9b3a3b80e3b75f9afcab874124690c9e6f1075b5ca8c35d. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/CAZ701002210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cee6da0b2faf845dff5b4491735c6bed3b966c4c6ca230d6b96f2d8457af52. 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/CA4YX1100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d2826240204948e0c1744037d4e95d4cd012a4893e798bc70027b7b4ac423b. 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/CA4YX1100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa17e9e986a664f6eb8e881f3f9bd26cdd3257802ff23583c1fb4a323f73f1c4c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CA4YX1100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869cbdb1f36a7da06ca23b6bdfab98e7e76839adcbfe719567fe2d9047281bbf. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/CA4YX1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecd5cc647ef2af985634a72a3cbd458d510ed52bd185e991e3c1f315e6b6e326. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CA4YX1100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8031653f1fda484ca7e2f71ba1d75636c56dc918fb376419e00a42a87ee5f42c. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/CA4YX1100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1c8ffd5348bf3f049eaac4298e049ee187dafdd9791f981da33ffe8050df56. 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/CAD941488008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f90ade96179cd7a73651f37987ee9761422dab8712b1e326617b86e330363a. 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/CAD941488014.