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 0x2fba1f3549898499e97bea1cc6da2d6a074cba7a61c74102c96cae2f245b11df. 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/2f37a6f9-a406-40c7-98b2-9f035a6b044a.json and https://artists.proofprofile.net/proofs/artist/2f37a6f9-a406-40c7-98b2-9f035a6b044a.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 0xc9179752a66bc1607ec708f0eaac055f62c57f0ad9757498a1e17362938430c3. 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/SE6A92169675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff6bcbaec686fd5640c82168aafb238ca090572ca38ce9f73b2866badb452ad. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:01:33Z), 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/SE6A92169691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0adef6abfe3c2b76f155798e3dafffffda640395c2ceb51a5e410548961dab99. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE6I32124770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214f74197e1fe3bef54610a831c70f153706243fae068566ee9caf49e2641022. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/SE6I32124778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x575cfc6ce8b2542df78493130ee6223809511cee1a929744aa0453d965b0ff03. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/SE6I32124780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a79192a5e7f094aa62394faeba972b30b8a277c15e547b654141ed0dfd67797. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:00:52Z), 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/SE6I32124781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7b36f46b67b5c53f6ef674805075711081c6f44e06450ff1614677badc1b41. 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/QZNJW2488737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ca21ac03169bcb8028807ce021433ac4a245a21a310bb7e8b53654e2e73b5e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES6080545022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37b39d69f348162ae4a68cd5ca454ef38edc731e6ca7f09fd1c4d9ffad7ceed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES6080363210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e2b1ec2f450d3d4c4ee3ed9526627ff93f86bdaf95b301fba9f9b42de65fb7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2050659.