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 0xa6cd5a047c5821df6932a1556f5d3d4ffff35d76afea5fc94b26270e07db6035. Chain 2 (Bitcoin): anchored in block 953885 (2026-06-16T04:12:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c36f714-709f-4004-a008-87bc98573520.json and https://artists.proofprofile.net/proofs/artist/0c36f714-709f-4004-a008-87bc98573520.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 0xf2dbc81eea6f632b3511e9271b521dd1537a56c2c4834a5bbb986de68ec71c6a. 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/FR9W12347816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe6d504ed2d8b75279c86405e414ca8aeb8d7fcd47c8099fe656085e55488e3. 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/FR9W12414064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x040180aeb9191401d5497e64c45d83e3cf64e71d4bc0dd4c877db88a806bc168. 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/FR9W12347817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d8d25125ac2bc4a307ba9b4872535d7052d49504f18d6cb4332aabfc5b23ea. 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/FR9W12347818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8d8aa3c699298c6d22762d6840244090c79dbb58a24161f41d0f902c880a920. 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/FR9W12347819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73316c2efd008d531a9e2d2cd2c0e4a52b1a1d32ab75f52534cef9c4334342f6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR9W12347821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c213e5794ab0d726d7f8501e5bd4d9bd2475dee6fab056c63b79afbe8bd2d88. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR9W12347820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb73cf7880e785f30f4c98f716a7fa6ededa8fd8523f4c25837b6313518898b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/FR9W12347822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1e13606043c779bd832d4286d2527477783ed5d70e3c2a16bf03fe836afda9. 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/FR9W12347823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab16e06068fea2190e28a56798046fbe7cd5d3c975c6f14908777bb0cc5eea5f. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/FR9W12347824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4a4110b0c20929c05e35b0e7618140255ecfe79007feebe62c8b52fe6d2847. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/FR9W12347825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f41fb06c0ea8ae9ff5a3323df7d25cfaade80071d5d6401b923d0cf0028eac7. 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/FR9W12347826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7714333b6d6f1884103688a06349e77a3c50218dad69cfdf46a0b9170c325993. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FR9W12347827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf217f8f7d13ceaf17a8d39c76d092d27f109a36c726e9028a1f426aeeecd161b. 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/QZTBB2347021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a64b0b40331fbaacaadb75a49ebd65fa662978fcfab16bb8421359616f01847. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZTBB2347024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8c7f406c3f73302e4c03ece55ca5a7fd8f32e56d8e5c1ce7d3393aace31428. 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/QZTBB2347027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa993413b7f187be251ecd79dc0a0872cf8eaa69f76fe97f70d6a77ee1cb0ad. 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/QZTBB2347028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71baa4837743dfddd0502f6ab6bb1b734f3c3e7628e3c5d828abc4ca30a4cc9. 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/QZK6J2161878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca74647092ce7ab4854bc45da5b8cef551910ed9af0563b17db8aa3181fad619. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZES92113452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed3435c0bc869e4ea6a5e2d9415a55d081a5c90a2636281063ecbc472a72e6c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZES92113455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a949c7299f162c717beb3751801201e59d40839970f4e2889743a70e16dcee. 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/TCADR1859146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3204319700fd496b67328aed882dffd43883dadc82feb157f6d7f9d7bc963eeb. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/TCADR1859159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5ddf53fd36b1dfb2c5c78f96bf8ff95ddcf1df7875d68568dcc7913d9f3f90. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/TCADR1859161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be52675c44e68f4cfe80171fad9e204ba4fb6a3d434e20165dc96608629bc71. 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/TCAEU2000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff315ae11177ea126de5721ff3d546df54ab70f53b74fca61863cdc155eb58d. 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/TCAEU2000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29f3908492fcc6fa2d8a330f4d944ccb4fe3316c79fd03a5ec489748572c131. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/TCAEU2000151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb1fe753cfb6a1a3a0f1114d1d19c592cbbffdf6e84d1a5645c10320adcb153. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/TCACX1700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x492b9c31c4dbd47b583a051878e24ed7fa5fb4cc2f0451da76c384be535b801c. 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/TCACX1700130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bdd549b2ea8b42f11f930380eb108eeb1e876621bf981ed7643414e7dbb28e. 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/TCACX1700134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a5dfc699a52f2dc68317192694056cb771b2418f9659461e108dc460d10308. 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/FRPJQ2100040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff86a3422cab81458d6c9a58a9ea4ecaf8040a4cf0511bc78eca78d819e2f22a. 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/FRPJQ2100050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf667206eb7c56dff4a68d9b009fbbc781845f55ba351f26e84c70cff366de663. 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/FRPJQ2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096b080f1fa9601a587bf9c9d82c85b32924759cea577bca2559dfcf63ee710b. 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/FRPJQ1501740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa27280b9cf07938b28d5a6f8b588704cbb4b06cec2ecbd1790c703a12bcfe1f8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FRPJQ2100090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa507d31efeb7a5378ef8d450479289f0b5cef4e2e02bc0cb96b81f0ce6d517. 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/FRPJQ2100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x681e788d4793c26a288ee1a3bc3367ac78cad6bf0d6f14c038bb3b2c43ac896b. 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/FRPJQ2100110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc69c4caa4d5a6dba4818adceb210cea13c26cc881bfeffb77473e7e7c27cf1bd. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRPJQ2100120.
78 Ouest Side (feat. La Fouine, 47 Ter, Chabodo & MakLoyd)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201b1a36e763787be1ec145967295038321ef2e9ea4f11c836f326281df93e0d. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/FR9W12216568.
Mafia (feat. Diaz, SFE, Bosh, Dom’s L’Expert, Toussaint, Stone Flexance, Chabodo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1041a3087cf8db2a634d1e059dcbb86b3c7309b3d8756893fe7fac040be126. 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/FR9W12216580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2232a45ef29b9f176e98d852b7cbacce4637f27bb76acba7de4c5aca13a135a5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR9W12331075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99715f01d6f3b6e365f9d08fb029b7ba0ea39751c6075eb94da77acabee55984. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR9W12330934.