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 0xe20449a3ad5d3519162c36c20c7c070ced4297f2a73a9764669d25bd5d87ee84. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/04ce03df-11fe-42e5-b907-176899d142cc.json and https://artists.proofprofile.net/proofs/artist/04ce03df-11fe-42e5-b907-176899d142cc.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 0xe8676f6a64d5e5cee730783a3bced93f3a3054572c820b79fc3d2b0e82093595. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCABI1271414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8cb9e04a5ea92ee74eb280463c9b989007b5db954dc429e7e34fcdbcc847ac. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:00:38Z), 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/QZHZ32027222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5222cda63196a46f060d97c511e6c5ee831c01daddcfebb155bc8585310aa8d. 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/QZHZ42066005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59de7df027c8ef6516bc1ed3d9b2206c27a919548ff981b3ac794c8cfde0d98f. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:36:00Z), 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/QZHZ62063336.
Espejos - Versiones Acústicas (Versión Acústica)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf735b3508319319a994c9aa86f0f9679555befcad92a69aacfba2a3971b2ff9. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZW9K2366827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652b0365438ac203646ba64b92e24eea2beabd894ef584a33278c2eda8f68dea. 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/QZW9K2366829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477218fea18caef1bac25f039f6d82e351de2770e8cfd1cc3a657f377a3b14ab. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US7VG1523099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae09061392fc08753db3d8f917e09de65dc82c92b0e92658a59474f2b1c60873. 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/US7VG1523102.