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 0x6ffc8a2a009134c88465b0469af5a6f2a7c8aa5dc348e6dc2f21a03c446838a8. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66163938-8505-4484-9651-05d76031a03f.json and https://artists.proofprofile.net/proofs/artist/66163938-8505-4484-9651-05d76031a03f.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 0x2bd81df93c869aa43e8b09a4dedb58c8f963e562aa2f98efd46474698e87fc7d. 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/CAU111019686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586cdc332f5d5c85ef2a2967328d7443d80224b2d378e72442c036bfe6538d8f. 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/CAU111019687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3212cd4601d4e7d90a99d104bc7119775c68e96dccf7aff5792e07857b00d25. 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/CAU111019547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddbff7a3bbb090dedd416207fb35ccc6f86bd8eb38e40841ce04aec3822ff8c. 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/CAU111019549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d8f9dd0429484847580a4493ff41ea7b84eda04bebc24f236b7a6427d85550. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAU111019552.
Last night (i heard you crying in your sleep)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53a2c0198a6e2a990bc09cd03a4d6e31bd6927c8f10c2332b8767f86ec5fc50. 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/CAU111019553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3c9a300b0f778deab726d2a539a8b55f6369a8e661394be31871bbe14ce977. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CAU111019554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086cc9e5bad19d3fe8e5a0ac4113f950c6b7490c2490978a531f4ee9ca4d1426. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CAU111019555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99428396e5db78ff13dc64ac29f25a8b31d1c1845684920b40662cebeaac773f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAU111019557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb6714c95919af4772687fd40d770cc055f9c08b1df99e772aa4bbfdc7fbfa46. 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/CAU111019562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66cabc9c8bf6a6e857870d2da0bc6c219b59eae551550b0ac6f897201db7eba9. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CAK922102730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132e6e5bff5191578ca497241af2cd8971651af397e4e6697510f9ab498e3bca. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/CAK922102744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92f4dd82b25a17102097f183e2f560dae2f44d9da3426279041a6cbcff42059. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/CAK922101044.
Hommage à Hank Williams Volume 1 (Remasterisé)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3942849d8adc91d419279b910a5881be6edff9bb8dc9dce6262b5f11fdd76d. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CAZ709700129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05125ede236cab7c218ab1bff5cf2c54a853098572332a383728becd08a42bcf. 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/CAZ700600799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf551830f725941b6535a33d6be607ecd28f52903c3f80c9903262c6f1e7aa6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CAZ700600800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5318f1916460b76f3fe7a532c59524799503860a16fef85c0bb47ac6ee02c4eb. 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/CAZ700600803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5d72fed8cdf89f0ec350fda5bc730c18a3c12a9cde1fc129f2f84abea5dffb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAZ700600808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa643108e0d57ac501474efa0dbff47836184bf1df64e0918671b7d45547a720b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/CAZ700600812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf5d9fe03446c5e3912b3eac7bf870fd15d7be2a835836ddc84dc093538f5364. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/CAZ700600817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade371fa9400ecc6ff34d1b9636b0c9e3cb522da53879bb45aba8794d99cb865. 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/CAZ700600606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45baddb4c37eabe46ce7ff96a3451bf102da3ce723eb7394d3dd4b872ff2752. 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/CAZ700500786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c92449f089afcb0774509d791af3d410d183d87a65cde578710a33ea47d9d6. 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/CAZ700500787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26ba9ec2a21b1bcefe438cbd5dbc416ec4c6d2dd1cb5c5597e754ce60800d92. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/CAZ700500788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dda65feeeb75aba256f784be14497b1f2b98de15e34dfeef84d8020c613d18. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/CAZ700500791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf351d5e24a7f79538433a1bc7eebb9b044c284f71f65bbc75695220d05472e2. 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/CAZ700500794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04eb9c6836ba7a6223781643cfaff58372246cf56c7f5ff70c1c26f46408ed9. 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/CAZ700500796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317d5555e0480db38ca9e92af26a929b9e3d8dc4734165e0fd45e982acbf2875. 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/CAZ700500802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3ad5f62cedfbe50bfd8a1e87cffacfce64a7b33531d8d2560cacaeffe34383. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CAZ700500311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34945038cb42e014550fd8e2c6aa86ba3d14fa55fb2489a308ac737f7285b1f. 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/CAZ700500314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34c8e91e91caf2ef84b47f764ef6cb7e18b7e3ee6377109bdabfc631442fa76b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAZ700500315.
Country Québec, les pionniers et les origines 1925-1955
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fe47e8791eed17d61d5d5383cf234bec05d90bfcb5710f5e557ee04eaadc5b. 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/FRX194617089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef6d92c2e6ae05e855b3a54928a69c5fffef4f0a04ceb6afaeb4c31559cd6fe. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/FRX195017126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e0e1f6ceaa8f662802d471a86e89ca204eb7231924c2f131afaa2013176e1e8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAK922101245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e546cc0664f17840507741d98dd225d725a4147b78d56f56574acc7cdef69f. 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/CAK922101246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66266a8b6c22ae224f665ebe9d222584339e36cd065a6b6038f5b573e635c9d4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CAK922101258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f4173d281cb330e8520199f91073826e6e5f5cc8f0a9e473c1b4ee40e0a986. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/CAK922101263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce56c59fd2eb4ec962b9f936cdcc6e48c590d993f4e5f297093bbecd9060866f. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CAK922101282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a20e82c4607943c1b1c381f2e2f316f3551e5d653963612bbe3f1783a65d54. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CAK922101288.