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 0x4f425d2120a1d3a891d8354876c2cc89765a464bcd7f7b01a50e2129f6617563. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/051ff5b2-a33c-4374-8390-af88669b93a7.json and https://artists.proofprofile.net/proofs/artist/051ff5b2-a33c-4374-8390-af88669b93a7.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 0x99a04387c556c120419c56cd68fba56befdb2d44f14c9182d2710e362783adbc. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZDA52295249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d771e85bdf2baf6f04dbe69d2e59f6cab709d1c1758f4b4f9939caf3e0fba7. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T11:11:25Z), 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/QZTVM2353616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc170127d4d4a91bcc81cfd2afe3a6cea11a0f842de54a96875a27f08552af796. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTVM2369093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ab8ebe070ca104bcb07dfe6db68b6dbb7fe64d1e94d1c048735a0f8deb2f7f5. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/AEA3A2376792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a118583e6b097b51eb972e27c86fd666b62cbfb4a0ae6dda8be8acbd15fd9f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:16:49Z), 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/AEA3A2380525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5450d5ebe2fff6a2bee883545210f93a928e0e2a873c9be28929c8af1aa09612. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QT5M22573060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f555b00ed6e941258dd5e7035d2347365fa2a97f6d3a920632920cb7fb6785. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QT5M22572109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1722c7a9e85fe544a250762c6ee6167a9f3313521420181c5e41dceca6ff80a9. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QT5M22559176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42aee272af681706320ec6a931b6b45dfa8f77b64fb1ad5e8a7e53d88f1fbccf. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:17:54Z), 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/QT5M22510595.