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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaccea3bab2ace86d12ed4a427f8d66e575535bc82c185e69ca6b10b07dd50cd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/360484e6-ac2d-4920-8e17-9721b47e1def.json and https://artists.proofprofile.net/proofs/artist/360484e6-ac2d-4920-8e17-9721b47e1def.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab356786c324d78ef0361cf095e1bb6ef48ff09b1b4ae78f314313bd25877d8. 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/QM4TX2057017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5845d74c50051778f93e0837a2e060dba7057167969de770380fb3c40a1c209. 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/QM4TX2057026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf000534d50e9834ba3a7209cdc355f5a334412755bde4864a4ddc2dcee3735e. 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/QM4TX2057030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697c29aca828104484be0ac377c3613ad2d936ce4f622f12e55c8fc9724ff409. 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/QM4TX2057032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6ebe3d9e46c9fa5c1aea8a9296a2d5b4c9b6a50e536486b16dbb786f67232b. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM4TX2057018.
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 0x2d195ee788e5f4862a3f92d2eda75af40bfb740b6788a2a8b1d04c2138008d68. 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/QM4TX2057019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e47d2e4c56492be22290aec6fd013022d8630bc3116673e86542f4af7ca9ae. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QM4TX2057020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d478ba05bb53570c7d6c5c1e2d672d5cb4ef8a6fa5cd2548894722fff975ef3. 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/QM4TX2057021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac642e97acd5589dd68a068ae38e942fa2c5761011908d49a98af0fe7234ae0. 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/QM4TX2057022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb993e4b031ee054bab586f42bec976424175d6f99a3dc379c6a6324590a6b0. 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/QM4TX2057024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0faa189ef38019bf51a88afbecb72b04848e399932e7605270a5b7fb93ac92a. 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/QM4TX2057025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aeec80f7e712746e59bd05213361d6caa0dfe84e483d2ae19ae8fe327859ba4. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QM4TX2057027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d29b625f15aede9d73882e89d863b3e14c4ed7f3162518988735166a1dca781. 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/QM4TX2057031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc50a02343ecc297010daed2a478ae7868833c807305d46366705738d1810f1e. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:11:14Z), 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/QMFME1948537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a60ebdfd27ede82424b9017f30386296a50c5e44988da6628fa5708bc8a045e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QMFME1948539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf215150e8dfd70f99fb2d8f5292add6531906d1f697445eca1ee0ba159ebbdc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMFME1948540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66631b308e5acbec4095931d0d5ee7dc72ffad1107d0af2d2e319eddeec9f28. 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/QMFME1948546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35feb3f1f66420e83a9aeadef778f18bd7d3daba0e58b744465e9f2ab359948a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:38:03Z), 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/QMFME1948547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe628b7654a20a0d8a86735a9ef82d0ea093ad4b69900e83d3e0f9b1df738a5cc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QMFME1948551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc47168a48b21eb94f46c579ebfcb067390a16450744b58019a6381c41f1ea92. 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/TCAHA2356270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc0468388c1b8068842aeb5b12a66ba6101f5600b060aeff5f0c8015e8b4b2b. 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/QZMZ92262346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb283097b1e6fc5c2dec0426c70d0bb49a0490a7138f5b41c8938d442dbd5e069. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6MZ2168818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f906b13949204f6a309866eb54dc0aa79ee4e96a0164e024f3ec36bfd6976a. 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/QM6MZ2168843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bd5a159d4d993ab4b2ba5b7497bdbb0fc21e7e6733500dfa087a8ec3c43d26. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QM6MZ2168822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81af763d7b9b24ee1b405d57ac30c49397fdf5b754d50ddc91b26531f77da02b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QM6MZ2168823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05e69d4a631e3ad8428a8b57a9488927ddef0e456a731720b7121132be28365. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QM6MZ2168824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886c4ddd6e0cd3bdf5fe94d8c748bb35cd920b6308bcb16e87ad49c57c5fda3f. 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/QM6MZ2168825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd896e3cf2febe8b4c9c303b987ad72e3c4a834302c2c3363bb0723e929ca7c63. 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/QM6MZ2168826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3922ca2501b0d873312b315dab56ad3acff35c1adeb5ce1e45e114db0c28735c. 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/QM6MZ2168827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8ba4fa823a48bf4d9d0943c59a836178ee224f904f2aeee80eeb8ea5ef3f2b. 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/QMDA61858690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x390a584fc5ccec4ac15f6632c5d22d4eec210d1fddcea8fe4a0f48cf208d157c. 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/QM6MZ1824517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca021d8f02ca7b69650d1a406e7cc9812e1916316aee8592f3d019a6f5bfa378. 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/US7VG1989754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f9009feb71c27a15b5d7463274993054973ab172986a5122e39c3bccfc58f5. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QM6MZ2168819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x003779943b7061339cd18ac675ef88e322426ba103461d203da18d19cf9f542a. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QM6MZ2168820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b830128331e3c42c1d1d8aacdb76f4611da89b0769c057cbca8a66ddfe0a4a1. 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/QM6MZ2168821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d19f2624e6edace66761b8007bceb0e5c55f713304eb5d683d60728d51d595. 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/QM6MZ2168828.