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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ca3274649f6010c2bc1ad8f06a462c880d597afdbabee2876e79bc2ab19256. 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/8d50bfd7-d2d1-43a9-9071-13824c8371fd.json and https://artists.proofprofile.net/proofs/artist/8d50bfd7-d2d1-43a9-9071-13824c8371fd.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb4c0c3ccca928f0dd20fce909a6e2268605d3ab2bd24daaefb219eac970580. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM4TW2405599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398952b255fd449e6a26bbaca2d0ec6bae9a1e459c1a2ed540b6c60bdb27eee7. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QM4TX2410227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8cd3bb2bdc4c8df7248fcfa866faa16ca89749af3a5e0101b4277189f024f2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QM6N22468531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398952b255fd449e6a26bbaca2d0ec6bae9a1e459c1a2ed540b6c60bdb27eee7. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QM4TX2410227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f69a0a641503616a4f533707a56acc77205e61cb37e23984084b7ef13bbc42d. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QM6MZ2408446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452e10934fe0cd513ac53935a7e3d55e76d111a2b2ded49a3323ffc39be9991a. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QMDA62470637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bed06e666a7ca5c1c02c0d25cf1d61e5f25bee0c772de7898c8903caa715546. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMBZ92445448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bed06e666a7ca5c1c02c0d25cf1d61e5f25bee0c772de7898c8903caa715546. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QMBZ92445448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5039fca499669ffef588139ddc81e8c352345869f4aaf46141e7dc62fa0da4. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QM7282430602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452e10934fe0cd513ac53935a7e3d55e76d111a2b2ded49a3323ffc39be9991a. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QMDA62470637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2cacd0efa95d242b9cad33a4391e62ce8dcc240cc348c3e41498f089d09708c. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QM4TX2581742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd12ac8b4c550a288956dd472eff208174cfd9b1463793ae8124241e091165b1. 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/QM4TX2581687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7338d6b449ffb3d190362e29c2f22a5563ee133a15a32196c6e9065a927ffc5e. 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/QM7282560692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56a3ee098147438fbbe1147b444ab01ec5a3782f6450804a893df559de609f1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QMDA72590087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a511c895a83160b23788e170efdaf8523a8e4370654088c57b581e93066c3a7. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QMBZ92536172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c45c31d673b6877ef3e6a49b1d5f9026ec2b27011efe261d7232cfe50285e6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USAT22215036.