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 0x0ed852483a186bb82bed7aa35c74bfe3789b2c9f11d9b4e07dd4f8b1fc4628f3. 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/1d8e9274-4d2e-4b89-b4c9-f90b03c4d054.json and https://artists.proofprofile.net/proofs/artist/1d8e9274-4d2e-4b89-b4c9-f90b03c4d054.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 0xb5817d22c66c6f9fc652f40f348ff1bc00cc9d1b233ac216fdb2d276a2867eb7. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZES81851666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e10fa4bb2e3fa32854dedb92d8696a97f20efe76cb1fa2b5cdd24cc815ae959. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/USA2P2029068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5817d22c66c6f9fc652f40f348ff1bc00cc9d1b233ac216fdb2d276a2867eb7. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QZES81851666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb56d7c957fe86e2834607fed08664ca89e4477d16ec26d6b8257ae8e989711. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZDA82224429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a062517a86a722dd01932736df6b81e3098ba62930cfb2706fa6e8a472c595. 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/QZHN82205086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8984072f75298b0811a530a2ae97edbc75d78210e4ff2bca1ddc4bf6311f46f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6Q2239234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff9e292c61b5f9a4f24b0dc5a35d9c6d0014b33c34600209238c6fb7b95f405. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZK6H2225976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ddfb588ec84948aea3cbdc169d375d757dfeefb4675b21bbdc51f1f7576045e. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/QZHNA2401137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd15f781bfe2aa407b94e7e175415be3ec2d659192a40f747c6dc7d668540924. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZES62498940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabaa4bb33e67a8dd4157c8875129803c77ca0596bb7ff4e981c597d56b4207c8. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZWFW2431812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4cab7866bdbc1446d59b4b6b9045e8a8c7c55fd87ed90c94933e671c4d0360. 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/QZK6F2440768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794fb0609042a4e3e468ccd11f0f93f477875c8a408d5a772c1c3984441278f3. 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/QZZ7S2467352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4cab7866bdbc1446d59b4b6b9045e8a8c7c55fd87ed90c94933e671c4d0360. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6F2440768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f77f00b7647f0c0feea76ef76d86409e92d46bec6ca139e173492abdf1485ce. 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/QZFYW2047183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e10fa4bb2e3fa32854dedb92d8696a97f20efe76cb1fa2b5cdd24cc815ae959. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USA2P2029068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af8bf0b5ef1b103eec939d3c2f76dd50fec57d3c4886421843be12640809642. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZHN42048495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41852c5a304014ca4b3d9267df35ee3ceb52c963fa0084501c6b20427111b55. 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/QZFYZ1913587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247b3482b054688ef645fc6c93aa7ee768645acfa85086537d3419906b0ff0a6. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/TCADQ1863495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa4e91607fe72ce071b46d5f8c01c0157d9ed9f40da6a499e2a5fca963d5935. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZFZ61954205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9eb745d929de39d243d8ed460c0476d7593ce96da7ece00e367cd7f5ee95e1. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZES51912782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1627f027423e49555ea6b7a60d457d0116b1909b7793cf7f8f7bdd7a8e3d9fea. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZFYZ2025816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a86c0bd5164af0d36abe40ec515078f93490aad0b4eb65fa245c7eb54465744. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZFYZ2568835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4cab7866bdbc1446d59b4b6b9045e8a8c7c55fd87ed90c94933e671c4d0360. 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/QZK6F2440768.