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 0xa1e2f12e5895d47858b3b4add98b39f47bf88f86ac3b26100003f2b13ce2fea7. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0cec45ad-1f40-4361-b06a-1e92c32a5135.json and https://artists.proofprofile.net/proofs/artist/0cec45ad-1f40-4361-b06a-1e92c32a5135.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 0xcce10e44d43fad060e8b1a841f3b911f7bd93438bf2afa18d1d01aeeb2445a1d. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USJ3V2329207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843c67009506f7cac3c70d56fccc3cd190e0e1f2be8e18a3d7b7f15827936f4f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USJ3V2329208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd3fbf2ca89bd5e80ab3156d8d2274cd363d79a6c781b9094ab2fa5acf7d364. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USJ3V2329209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc511bdd0e7b55050f2f4112e231e90be839b1e433e24bccd1fca1ca3a5b1d428. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USJ3V2329210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8f958f4f29a20a46de97cd711b31c30e01b0b1a6b21d5b0b2039c2b00c81d6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USJ3V2329211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f62e4e48b0f8c52b5c87cf07de503c0751ad5865c9b210aa505d7da89368191. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:46:10Z), 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/USJ3V2329212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99d14256a86d40b464d3be39a5c5246dfa5196e3f4de58a8b7218160c33e07ce. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:03:46Z), 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/USJ3V2329213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799eae792db4a18ca8dacd254f098252f69ee995e6b9d831623d8008a7777312. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:16:28Z), 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/USJ3V2329214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1fff4adf5c7eea379dd9206479ef5f84b78babc2dbe9cb9aa988c678937cf3a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USJ3V2329215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2899f127bd9a46c1485a9482a2ecb3e05e12a26a8c15ca18e7f9c98e9c926bef. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USJ3V2329216.