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 0x5fc05c136c032aeaeee5421cdadc5d1eb7f0c73682d99adf294a0510b8b171a9. 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/6f1aab80-c7ad-49f4-adfc-76893f136b86.json and https://artists.proofprofile.net/proofs/artist/6f1aab80-c7ad-49f4-adfc-76893f136b86.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 0x14aae3d9d282a363bc817970ab8b3e882dbb5572b7f06753a6623d7386a332f0. Chain 2 (Bitcoin): anchored in block 957705 (2026-07-12T12:50:42Z), 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/QMDA61326825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df842a908ab593367cdd6d87e24cd9a179d5ed0fe22125955b1a720eb53e075. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:23:22Z), 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/QMDA61326831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338c639f547a37c688e77e19d8c311f96cc52a64ceca079f613dcaff6bee80e4. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QMDA61326833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f043b603cfeba48fac96e4fbfbaf6f37384eb354088bdc23f0a31ffc037068a. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QMDA61326840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40fd0117de6f46dcfd6930baa68e75622c140e3288b961ec0e458914b6e09611. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:27:21Z), 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/BRAPI0602928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef408989f16ca3c0886875d6a404752f221e5c9d3a3e1718c4cf136a99dccd0. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BRAPI0602929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edaa79559897fe937fa1d5dc56a64e70724128be8868cc71c1b2518fdc84440. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/BRAPI0602940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde6b1573c769f0f5088ec1fc760ebf24475ca29cad8c7f72d88551e0a2cd260. 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/QZGLS2343898.