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 0x643995f2f3714976b3781bc592cba0314bd0f5ca1a4251aa6a60a7890538e5e1. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a5c482b-c823-4a36-ab2c-fcfb4c9d6f04.json and https://artists.proofprofile.net/proofs/artist/6a5c482b-c823-4a36-ab2c-fcfb4c9d6f04.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 0xe1fa8443cc4e4fc257558b66bdf254ad157ed206f572c87db7efe9124d1b3261. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QMFME2472184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaed08f81fc8311fb1ba9977efe12d8c2424ba1e5247391363ff78a1a26b7283. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:32:18Z), 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/QM6P42539655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3572b24d33a5d6edefbdebc90965f62b3f98226f8e3c45e682165b5de6b164f2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:49:31Z), 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/QMDA62507135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3fe1c099ce6300f83d6c494ad60c5a6a75058e4de772c3d82684d4c5773379. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QMDA62507152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56401c3166aa491bcc4bfcf65f59f294e6e0f9f7daf63c3894e93e7705baef17. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QMDA62507137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe056b4b37205a6c37c6730927a8e8da163787fc550fd8ed06d7f0891d2d874. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T03:04:08Z), 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/QMDA62507138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9aee68fca8efadcdca4e6d70a81bfa23950e4d529dd8bce145105c8090b186. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:08:15Z), 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/QMDA62507139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ac75a8b751e57980790b1da0626dcf674d1126a0dcd92eab7d89e1ca831395. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMDA62507153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0de8f763c411206d1e3019c7c6e93bbfecae105bf35dfd7bea59fb6807a7d2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMDA62507151.