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 0x0e9138371a3a74d1d21b389d20efc26b12cc6b0b5ca0ee2ed54ed484cf9a1b32. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10963692-311c-4e3d-95e7-563d1f56f079.json and https://artists.proofprofile.net/proofs/artist/10963692-311c-4e3d-95e7-563d1f56f079.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 0x4e6cda0225e98921acc569cbc069f1bd5e8683207fdcabac6aa2c08160c1768e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCAEQ2013706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356af4d4344332e904922145b6953833e9a9bb1111dedc718e12ddf8de8cfb87. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TCAET2078230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e4a4306515fa934f5cfcd26a3eba7c8adf4845aa85df79fd9bfcfca2f2db30. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAFR2156006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07cf2b31ba5a1f8f47d8cb3283a1d916af0513476dbc5c1a542f2fc8c2ab530. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:10:57Z), 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/TCAFR2177799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc87824543dc68d6efd99bdb2153148e7ed9e9fdc509957ae4d7339adca3ac12. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/QM6P42382101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e3ad70f06c751a21689473e1b804153d424bda7b1b94881340393c66ed11e4. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QMDA72339120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7e3f0c58ec21e383aeb4d90ce33dd38ba9fbe1ca91c4d0670bd658ea2bd0c9. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QM4TW2486602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc5213227bd15d318e0c2a3d702e2a4774f1ce4396bd381d74aa9fa70e16164. 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/QM6P42479990.