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 0xd72657721ffc10167406d417131e0db459dca5d8bd741328807c23e96dc6fd73. 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/f6de0f69-f7a4-4752-ae48-f5fd94822125.json and https://artists.proofprofile.net/proofs/artist/f6de0f69-f7a4-4752-ae48-f5fd94822125.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 0x340c2b2b18fc31a07190755286184f829198332a09c79e8867a91e0cd625284e. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/QZNJZ2365469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020ae56b184069092a81b9c47e1a4e9b8ad237ea6c67d2342d5e999c62fe609d. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BKKBO2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ab2dc0128875d395bc8ac2eda3b54c16c0d460628c8fffa41cdc9bc4ca39d8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BKKBO2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c76a8b48cd92e65db2738d93ec6df223d723cd91797bc252a8aea38bf7d832a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BKKBO2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3ad0033a035e49e6b958b02086d3172e0a945bada5dee2300f4ffae159ebe5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BKKBO2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x096057a1544970878b9b24b51218f3228832ec620f44bddc6647f31ef5c02b68. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BKKBO2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9292f8d4ae8aeb78e9ae5c30b6308cce28345a4f094ddab0908067ef2de8ab06. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:51Z), 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/BKKBO2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f7bf9fd2ab081193d29dfd97f0c4eef7996019f84f4424484e21524be5d5f0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BKKBO2500014.