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 0x090f6fdb1bedded30df7b7e3757af5321603b5ab2b1956ccb0adc36c2ebfd763. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dde095d4-833c-4ba5-bc32-c8eabddc25d5.json and https://artists.proofprofile.net/proofs/artist/dde095d4-833c-4ba5-bc32-c8eabddc25d5.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 0xd9b776a4f67d996d2e9f7fe0d0cae3dd286149091e13941ea043c04d571f7386. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/ES6062290501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf875d663de8763635dc501eccbdef50efaeff2ef2cf7dc42e5416328917a4dc2. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES6062290401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94384a9bec41fd54c0e8d193a75b070779530555276951bfa487fd44545e713c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ESA082050547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc75d429c7d27c68bc97b09fd60181dde1798f7f15a0a37f6f6e7df20c5870f. 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/ES6062397001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5608f8928d33c5cab676ad7eab979fca364846efc04ff0f0fda30727d57bae86. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T05:30:13Z), 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/ES6062399801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949d4e66026bb2134d847b960fe64b0fe886d7e9200cf39130d0ab70c47eee63. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ES6062409001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdeb07fd6e27d502a7032f667a23bcfab2ab7146cae60968517bdf63e87c467. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:36:27Z), 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/ES6062415301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb92a603bcae49ec2dfb834cf6dfafc1da1e78d70551103f0e5a7955a86d1c13. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/ES6062532101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf446873359f6b7996849de5fd471ae5e201ad0ae261f3dcc7d16479e10258e63. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:46:48Z), 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/ES6062535501.