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 0xbd9aaae8e62c0e477a2f6912505b7a64855d085e157b8e554fd05ff791ebd6be. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f625cf7c-7616-492d-a6cb-bdda5fe191a1.json and https://artists.proofprofile.net/proofs/artist/f625cf7c-7616-492d-a6cb-bdda5fe191a1.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 0x7942e5307a5b8b3f764980dc91a7f53dd45ee7eb581bcd8ac417d8189b2a99cc. 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/QZFZ52161842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27a34b3122f0b84f43fb01455abe71d735dec90a1f4b58f25773f59a3d0bb9b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:09:17Z), 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/QZFZ72140902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4219e4bec98ef2b6f1dcdf173fa5a4a6c78e4489d007dcd9a09ec8c20023d49a. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZES52103260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb82474d7d9f53fcf9d6b7af9200e8b68fa3cdee86f9c64c979d6acebecf87c. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:05:58Z), 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/QZES82147775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e243f192abad1ad62817bdf70be57afae57d01f70296f767107e86c5ea366e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN72134492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde484beb68c03fb690fa518bf227d393882a76eb0db59c6fb629dac2fd904834. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZK6L2152216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2b90101645d0206bbd969b9dbc99ed6ea1cc03ee74a382912c7ac0e60545420. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T08:53:22Z), 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/QZTB22245439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7715c3843d893e7a0df35397c3493a83da57c5f1d5551896d6ed16a23334c45a. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZTB22245438.