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 0x7c3b17ed4ce900be84cd0a4c01330c5b2e9bbc3a44ebd32016a442e63b1cfe56. Chain 2 (Bitcoin): anchored in block 953696 (2026-06-14T21:45:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/72faefd3-62ff-40b8-927a-47ec5270e615.json and https://artists.proofprofile.net/proofs/artist/72faefd3-62ff-40b8-927a-47ec5270e615.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 0xbb6e7b3102a3583013930b3a958f7285039a92510d714def0fb0587ad0dcd010. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:51:47Z), 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/QZK6G2237223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe22495b90988494a2c73f2b71ced89b3875b9e12d33859e1818b706422b921e. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:11:21Z), 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/QZMEN2295509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e255574c22e5f90eb8a4fd4c8840b5d2999d51dbdd16d6f217c060afd38d8c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZK6K2344235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf4fff2de270cf5cc647a173b70cb448b65b07f42447ac695b039ce5c9877d99. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:30:42Z), 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/QZNWZ2393835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc86079dbba02b79e6acf74927fd96bc2d3ad585a534786a6b6c2fa9856dd8dd. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:38:06Z), 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/QZZ7P2463568.