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 0x840979a3df63387f7225d1fd9f9279687cb1dbabe55920a40881e146eadc1488. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d1d508fb-b509-4f40-9a9b-28bb2297965d.json and https://artists.proofprofile.net/proofs/artist/d1d508fb-b509-4f40-9a9b-28bb2297965d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zockernacht (Klick, Klack, Headshot, Boom!)
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 0x5305b21e92aa3ce73f111e469b8035c20e69f1e355476ea4a7e6ea4ef0758b1b. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:58:50Z), 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/QZES52577941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a67c8c9884ac2cf529278e95ddc97bbd91f682e6cbf53346eafd92ff47aa2e. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T03:52:18Z), 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/QZES52579559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc79c8dab137af43a0ce1a7cd8e63e75e29848430a88988f818fab70b3b3f109b. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:56:55Z), 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/QZES72592284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4463daf61c1609340dbd3c9d50834877ffac4bf112c3843c897f39d56b807e4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN32511657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x657de54d53169b845fec4efcda8a2723a7723f93eb58364884628db665b6da9a. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZHN52567761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2118a37c67f35438a245e70b2c371eb68ab41e36d9a83c74f9a341d20c990903. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHN72544596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26809daf149e646d4605e7fb32663b1939ade162b30c0ac50fab47155dfaf54c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZHNB2589171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5479677257da68db8dab2ec1b7c473863b0cd22317976b0f881a7240ce14b93. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZK6P2530655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cc419901b832cc6f1b3a7731cb745761125afa5d06fd9b9b56910f86749c69. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:15:32Z), 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/QZNWV2541417.