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 0x100bddef4036eca0fcf868cc9511df64b9ea7fc35db94a63071eabb066e650fa. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/15b71f90-6bab-45c8-b619-718ea8822dc8.json and https://artists.proofprofile.net/proofs/artist/15b71f90-6bab-45c8-b619-718ea8822dc8.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 0x7a121cbabf2365e20acf80752996cd836d0fc11ef9ff4c78baaa021a666816bd. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/QZRP42181702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cdca7bb5fa6579b5de6d638c1e0a917de3c8c2af1d8d771e2174e43d97c2ce. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:51:05Z), 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/QZDA62216926.
Toothpaste - Live @ TWM Colchester NYE '21
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8a1605916c9094b766d78caa658992781fbd9121d57f9f0c66185312ad92dd. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDA62216927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030c2d680179755026987be23eb9e411b26811a2f7f21372301a33935cbb694b. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:41:34Z), 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/QZMEM2256598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fadf67780e344c28688b23f59b6b532a1cd52e21771fb212e5a823db00d8999. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZFZ42521218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892251a4fa9710446e5fdca71e0f2a3de8bd0244d8041c32c1a52a2359dd66a1. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZNWU2522058.