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 0x1640a7abd6b1dfcbb5b750fc04231a9e7ffe6f2574484f191c364cee404cd517. 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/f60bd03e-3cd6-4d7e-ad3e-f38c93dd9254.json and https://artists.proofprofile.net/proofs/artist/f60bd03e-3cd6-4d7e-ad3e-f38c93dd9254.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 0x5516e3c5176c17bc47a2323fac2bc41600be4652df65240872001c0e0d34d477. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZFZ72046582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873b91825baaa454c8af8ba53da6e27650d3856b30d0cff3dd2d69c9a07f0c5b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:20:13Z), 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/QZFYY2336675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dad6f761b381d36049a917817ae6b85e704939f82747e5804265d1129fddd47. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:34:20Z), 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/QZFZ72337051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3648dc52a8513b24b77ac03e0c75c6abc63c44057ff2de141b169e71395db8. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNWT2435228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5668a9838ab6ef6f401bbba4532301958f3e9f6117d477f2f62cb12735bf10af. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWZ2427320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2889e052c0296535722f7033755f5f05681455729b9970244aed36ee91790b75. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:05:57Z), 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/QZZ7K2434595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a4ff4ab9bdb93669c18db1b2c9cd8630c625c25fe05ffb30f1847da5f5465d. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:45:00Z), 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/QZZ7W2426920.