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 0x903fed35915fafdf9870201408878b86ecfc9ac8203fed3687fa0f1e99146071. 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/9131b30f-8b44-4f7d-a75b-a1d24994204f.json and https://artists.proofprofile.net/proofs/artist/9131b30f-8b44-4f7d-a75b-a1d24994204f.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 0x46367a38df8d656b1ea61f5cf90f5bae66b1e2d2b30a115f634a9686d6e3f296. 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/FR59R1619819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d20e80c5586eb472ca74a23c084d56502705aad2848c963daae2b8496c366f. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/FR59R1619827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd169a7dde0460c7dd118951f7f0f985cc0d65ceec2cdd0554555a46a1da281bb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR59R1723434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb89eea11a58735ad1bbc7311ae08eace08ba91741aa4a7d6637fc956302ef5. 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/FR59R1723435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57079d78ffcd5370fa7e6ed241e8a0d430de27c1ddfd316922ba3c6b7e78026f. 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/FR59R1723444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd17371a4eb268594e10dfbb41e4fb27a90d7e9cd2976337dda4d44cbf92cfa5. 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/FR96X1933547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02054c41bb49352c4e0146cfc414478f9e4cb3eb6c10d40b5410f74f4952cd92. 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/FR96X1933548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c4d8924abcc18928321793579017fe5389fa72e896955777dbef40809c78c3. 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/FR96X1933550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcbb8a8a49c7dbf6f5ca005e1c8baf707361d708ad9f884463dd45f1b6fd1d03. 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/FR96X1933552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d24978f002cde7058c410c8d3d5251a8264d8e694fe0781e4c1d23541ef9f6f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/FR96X1933554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0b3fb3310a3092e1c7a92c5fa24a72542e3a7cac59ca8a36657653a49a7bba. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR96X1933556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e8021d0c2a891e2c25cd0bbac4fab8e46915daf89d02b8c7da68918aaa124e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR96X1933557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2860681cae55584358343f5e5d53ce2c8db284ef13f3d11e86282727725c2efd. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FRX281988637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2981caae3f6815df09619f504e4c1476abfd87647c9fcf1fd8509bd532c9f330. 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/FRX281988642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308a780a6184aa13ffd7ab3558c0e0a43a161722368c0c65fb7940d82cc9a102. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR10S2178586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff872e2ed43cf7d19dc714365567e8a38d9a447473e06a8e8fa28989921c1758. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/FR10S2178587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767828ea3657991c661c7b01b7760ba90730618d88edb9f90f7b438d83f8a985. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FR10S2178588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11eeffc1ec4bf0c6581e57ed7750b6a0a1d7420378d5ae61c5315cd229a0dd3f. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/FR10S2178589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546c06a91f8350b74041101d816469656ee1d5b621d3742aa3ba38c8d93cbf42. 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/FR10S2178590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67237d5ba8a114ab215acf296b150111538ab5490902850a4ff27e09d4a0ae06. 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/FRX872129817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bf48352469bf39bbade4e175e16fbd852b869795de8d14b5181eb38cc4affe. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/ITEF62200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e67a3cad80860db85dfeb3adb71a04f6341e89d1535f50ec32567ae8a8be68. 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/ITEF62300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557295f3672b70082ae2abc4003d88f599da82928c89bed014863a23c45c92f3. 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/ITEF62500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896696942642f1bd535118184dc937083239a46224cfbc971be96e13cddedf44. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ITEF62500062.