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 0xd60b0c4b1a49e3478f3cc805f8393d842d271b722a839b0a95501b6644a6da06. 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/a7674e5a-f071-4372-a42e-630435ea893a.json and https://artists.proofprofile.net/proofs/artist/a7674e5a-f071-4372-a42e-630435ea893a.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 0x0f3e96adc881db0b211be95c6c5a836d70c7c221c374fd7d26b3929b2e9cce22. 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/MNA031900023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305dc9d919fba73724366db26474d07edb57f7813edeb2f64b9c1eb1134dc9be. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/MNA031900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93c74255b77b8f0831342c2d8328662a1f670c3881937d406237c0a09e0b26e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/MNA031900100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb11e5f367ba13e10efb1d5200f45a0e82ca83e062da07c28cd721e8c0c2ad7. 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/MNA032100136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004caec1e8601cf877c2e711454e8d61defbedbadce0ac5063a61e841bfa52ef. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/MNA032200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d0c84a07500f98732fe54e7805dd34c1aa83f6434280c7b252dcf815de0050. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/MNA032000051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf7bd369d01ccb14e3477c0aeabdc1ffe68fa6add12fa6e71c03e46f7e69b4b3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:50:44Z), 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/MNA032000148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ec56169a8f1aebc84ddc99a58e436d76cd4ac91d9c26d8f15a56a5158a95e8. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/MNA032300106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e30a8b7ece6e8a12f9685885280cc4cc1fb13e3b65e9db264f7c31e928eeca. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:59:32Z), 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/MNA032400421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c32d71077e6965a3d1f704d2111d7e8d909fa6cf81991da526cf2b888db676d. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/MNA032500190.