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 0x5d68e9c68130b8c01a465d46e094b524f6c75037bf018eff6541c910c2829b38. 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/01e88499-4ffa-435c-ad46-968c3b44f16d.json and https://artists.proofprofile.net/proofs/artist/01e88499-4ffa-435c-ad46-968c3b44f16d.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 0xd4e8199bdfb48908d3242a193987ee5976db6318d5a6e90bdbf89625e24d430e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZUBZ2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99a657b6bb34f93c1e78cf6efa6bc605604bbe742d4b1980422424a4edbb4c4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:35:20Z), 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/QZUBZ2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbf29e5863bf4aaf50185841caf78a3cc7093eb563cbf9d88b800fb6a4e15a9. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZUBZ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052a067a5a9a9cbe2f9d6b5325336fca46ec6474e528e41abc61d7bb2a2105dc. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZUBZ2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5837a6fcabc9926ea9317a145d15d0cfa2149c27579b632bbd275154e4722ad3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZUBZ2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2be2a05a7093318c177f81edbdb7c3ef5436dea050df42626ea79bdfed2d80d. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:08:18Z), 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/QZUBZ2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe945595900321a050dad80cabb23ee3d78d93baacb38614d9ae2471ea753001f. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QZUBZ2400005.