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 0x9c75ff1d61269604551c1d96decd291a6b0928157350d044b2b874251ca31d94. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6005379c-ebe6-4b73-b88b-0d7c89c676c4.json and https://artists.proofprofile.net/proofs/artist/6005379c-ebe6-4b73-b88b-0d7c89c676c4.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 0x6b65b6380305bf5217323818f8c788f31b2c04526ad9c7ad040e50e35459e158. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:33:34Z), 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/USV291303903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fe88641e5ee831806d9709fb80995efab0b7bf120e4dd30723e1073461425c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USV291303904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb95a961a983b31e10c714e2e65c9e54f319e5d58e44309e7dadfefd39b4e7972. 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/USV291303907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d6b53b310c3fbf189af30590f734e775f1d7d12d5e50ca8b8a4c1bb6343d57. 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/USV291303908.
How to Go to Confession (feat. Sammy Brown)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3760c6236b04e81ba9230ec6748dc8e5bb2ad6b62db2cf6177b80ba466ff1f11. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QMDA61356084.
Clouds (Largest Clouds Choir Holiday Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a9efbfe27d65a9a5dae47fa4ea526f662b4466e1f2ccfe8a91fb7b60f187c1. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QMBZ91327447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2eb8fa5cfca91bc3df3b2f09f1e7dfd1a7528c83b3b694feef31a3c525dcc8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFME1418993.