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 0xc0632b5a059a544e19936684288a32527358180ce658d4a1ec38091cf2ad5feb. 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/e0a70fdf-5b01-4438-8760-cfb075d4d750.json and https://artists.proofprofile.net/proofs/artist/e0a70fdf-5b01-4438-8760-cfb075d4d750.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 0xdb8952a8b578a0f9952c3d3e976a26d7c47bda9b6770897b37e56d95d1cd478e. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZFZ52153960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775be44bd414c869da1d0c29696ed75cff57c829fe233ca256d7d38732dd373c. Chain 2 (Bitcoin): anchored in block 957587 (2026-07-11T16:48:26Z), 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/QZES72350440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b33d2fb2800ff70f08ffe4e08e15d455035701d66f838035103183eff97e85b. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:42:48Z), 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/QZDA62480715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b3747845848122a19d99cd18de2f06b0340adbbfdf6c7a86ed93921d752301. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FRX452481535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3305de658f488a670d4eeaeab4d5b2bcf5834e24265f90707826ca6ad3de704c. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/FRX872432136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dd0155671185f4dd3cc453d43632509ebd4d1fef20a67f0cd16cb60f04e2fb. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:59:15Z), 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/DGA0H2482644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a4a678dad6e095705fca047a27a32e4fad7e6ec99617a4a0910e11b5a0ca4c6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFYZ2540407.