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 0x1ecff19b1e3d0ce7836c8a1d5c5bd396b9a603e0669cb624490160f79669f941. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fedb02ee-bae9-4487-a06b-23f1bb9a72ca.json and https://artists.proofprofile.net/proofs/artist/fedb02ee-bae9-4487-a06b-23f1bb9a72ca.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 0x80f6f7dc1745715ab1bbce2cfaad035aefc5c576707d1c4901004756edda9e79. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:30:23Z), 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/QZNWY2167467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e1bdddf5465fba8d0497b53d5bebfb23b689d47773e5205841eb08c71ef996. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:25:10Z), 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/QZFZ22221650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff897273e354ff484a019fbd8a8cc8f91470388eb3f54c14f5da5f47d31bbdb4. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZMER2264138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7641ed71c58b07eaae5628ad277f945e01bb983784efb5f0cf62e886228b1a. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:43:43Z), 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/SGB502341277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4641c89d26a43a49e3cc91bfa6db193f022e75a0d87da7de800acddafb868584. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:05:42Z), 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/FR10S2445564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24aaa9f044917e74451de4de17638924fc76956483e71aa767cde9529548e1b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:11:37Z), 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/QZZ772567068.