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 0x9f1bc170c6d48728d59c98a4a98864ac837accca97928af03628348f7b306534. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5602f71-769e-4763-8dc4-607e1271ecc1.json and https://artists.proofprofile.net/proofs/artist/d5602f71-769e-4763-8dc4-607e1271ecc1.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 0x12d7318749f7bc668d0be8578a2cb66d4ddb4014af5890529467abafde05598c. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:16:40Z), 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/INSD11948374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x805ac6d043af156dff95ea756592c56dc6f34afec2878c628bc8072f6146fe28. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/INSD11948398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd173a65254e4fdf109f2c26d9fb4fd229f344543b6de7709f763dc35ab825fbe. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:35:28Z), 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/INSD11948840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89353e6e79868edfed9443e4064ed0737bad6c2c5ed95398bb2fda644592e63f. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/INSD11948843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd660a2f5aff9c82ed4a17961df98e1bf93d436f4e994c22c12eb790d3dbbd22b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:28Z), 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/INSD12500367.