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 0x3b9e6692811a7755215ca64371109886de3b13c868a88c79452cc0522260f587. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d79a182-6ab7-45af-ac40-adb240cd0a7b.json and https://artists.proofprofile.net/proofs/artist/9d79a182-6ab7-45af-ac40-adb240cd0a7b.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 0xc873444cbcdb7761dcbc7ec9efe8955a6db6706e0d8f8d3525c0374befab2f06. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:31:06Z), 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/FRX281733013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa954e2287b6f955568b842fddf88944b02735b20f527a2445551fcda2df16235. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/FR10S1808834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4992cdc9bf405a7b769daec7c010c3462bb237bbce7e9344134b82790d1e7b3d. Chain 2 (Bitcoin): anchored in block 957744 (2026-07-12T19:15:44Z), 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/TCAGT2365353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ec67f204771e31cfc20d4fc69cd42ddd00ec5caaf9327660b4fe0f89c29c68. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAGW2332792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca673931d962280a720b6407edde376b606dd9d125b1050f8f9e54dfb79b999a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIQ2455874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e26df3b9a7565b9276f456ff1456f9734c8a5f5c45a1d2773788957405af3fd. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:06:39Z), 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/TCAIR2455930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x472b769b9d2ba1c083d44ae1c6294b9a4b9d66b37b34efd23735afe291826693. 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/TCAJE2599891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04b93a3f664615efc404a965a00400485e0a5e06dee5c36b65f3182d74a4ae2. 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/TCAJJ2574380.