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 0xe1946f66dead4711fde3129ded1be0cea644b2ff8ea50d2825a53b98ed9afaf0. Chain 2 (Bitcoin): anchored in block 953719 (2026-06-15T01:07:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88c28ec3-c7b7-4286-a28e-8ef7f1009a9a.json and https://artists.proofprofile.net/proofs/artist/88c28ec3-c7b7-4286-a28e-8ef7f1009a9a.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 0xcb7749fa8bc3cff803cdbd517b8f46709658b2773970ea5120c03a2d21e72db4. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:51:30Z), 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/QZK6Q2291476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb147727c0f7b841f65022e5795b4542c458874a35c153c7fb3e91a34a9d361e8. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWZ2246347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03815ac82c3104df196a68fbce1556540cc9b86057648e9d9cf02352bcd0b3d6. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZTAX2239789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c6154aaf7b5bead2a47df1ddd215315a0862d3f4740153475fc959e9fad3d4. 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/QZNWY2368574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb07887057ce988b585b11223dec8fcffe045984336e0b9ce9867d7d87f1797. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZNWR2386953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383b3a4079f885ba6cf21816aa84546242b23669092ad17701af2f322c78da97. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL5MF2102896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf515c498a754a56b429e34fb1737582a4d987494765571a5f15212bd6b27fecb. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:09Z), 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/QZHNA2558261.