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 0xa82465bd85aceb403fec2d2f6b029c1ea3f41aa671b61b6eb76ed25d6b1d8cb4. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/74aa31f3-b0c6-46e0-89c6-0aa7f8ddf7dc.json and https://artists.proofprofile.net/proofs/artist/74aa31f3-b0c6-46e0-89c6-0aa7f8ddf7dc.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 0xdd78c5272e1dc6a12d00f59ab3e211212aafe7d8c4d2055115fe2a3a18bf4bfa. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/CAZ700500743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ed9ef3f26b0005b613a98b2756253749de809722b6f8694048833747d6f0f4. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/CAZ700500746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f29ebd0dae774eeab831bcfd380811670a5ee6e7997102b96aa4727f25ca60. 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/CAZ700500752.
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 0x9cb93fb95f34fa9950325ac6e3932ceb64535f474a482c9dd18135ca06cca6d2. 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/CAK922102064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8421c7b93d22659f422026972a2cc8e75a618cc48c8a8938f4787a2e64d6acc4. 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/CAK922102069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac23fd5f21597ca73d3ea3443b148d0d28d8c0d6748ead5ded31dedf53dac5c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CAK922102072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1523d619e78715e61849e4d055a0c5a2fa989eaa54a6a36f8e58658ba45d31. 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/CAK922102075.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44b80fb597f6fc21858abdc3f34f1389f1e3603e872f79fa94aa9feb92edbb17. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CAZ709600053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa398ed4d96dfc0f220f20788824958b2199fa123bd2881c7418859f03ad944d9. 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/CAZ709600054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1e3e10813cadf2a38773af591593f1660489709a63214d884d11f502b956f7. 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/CAZ709600057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494190ed9782d61b9eb5b5e73e655b6bd6118a336278e1d9f7396ff3890652c2. 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/CAZ709600059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2844020af4ee3b56ef2d1728040b32a6dad4d81d043561bb67e22047df8873f. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CAZ709600069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40634cf0cd4e411a53cc80c994da1babafb29fbdd30e8d02870b9292f732ef8. 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/CAZ709600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930e46489f3daf3e2a9f13fadbb2504ca9bdc5c20484afbd31ed15c9f72b3277. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CAZ709600071.
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.
Le country des années 40 & 50 (Avec les vedettes de l'époque)