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 0xa517dccac3ee9fb92682fb4cbcc2fc49d31c6224e43796f4baba437f11a1149d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c3920493-f79e-46b1-9800-8d67dff0a584.json and https://artists.proofprofile.net/proofs/artist/c3920493-f79e-46b1-9800-8d67dff0a584.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 0x865d49e4b8834442b7312a288be8de4e6399294408a7e39a678f503b6c398c18. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZPLS2210267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a82b29720af88bcd5e3c06b4769f3a13d9e02d1681ca28ce9be9bec401f7e84. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZFYZ2392178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5313fbe09efefa573efad3a4a190b9ed5acd6cbefa3ff5a66bb8cfc5f0a01e5f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:34:09Z), 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/QZHN52353572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3559c44b9cbecbf157c8d7557ad1b816d21c0507265d4947eecc572d076006a8. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZTBB2458347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cbb2f7bdc9df7df63901808d6e7722efb885f69934cac5ce486be0699c6945. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:24:29Z), 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/QZWFG2481500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c395e80777f602647e735d412ffbb12f4af23fe25a456e9dd26353ed7b48c9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZZ7Q2416779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe527e9f42bafc0d6d50e6d100c82f5fcee2a58b1c3c94c55dd1a878116b4f304. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMEM2536343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf439f3bd0e79c799a271927746303270813207a47e64d427df9549b64a290bab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZMER2515453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7663a2f9c1c873493045859b1341719a5a7cb3cf4c6ab77c7546a2b3875d5d77. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWFH2566181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d26a35b22163ad98cb92317cd6c4ed5ab5fd16fbb8915f9193cd66f76e5753. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZWFW2527911.