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 0x6c975eb655ab6094f386fa0d26139ad92f1b39f4b80deb7a000929a8e2b7b297. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06ac0881-fe60-4adf-9ad3-25fb90c9f750.json and https://artists.proofprofile.net/proofs/artist/06ac0881-fe60-4adf-9ad3-25fb90c9f750.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 0xa04c0bacb5067defa55715686c14e46bcafd7e1bc0164a0ce2c6b77b699919e4. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T08:36:01Z), 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/QM42K1945867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6d8cccd07e204466ebc12715a97f52c3394976d70569ec6ce9c61a56ce2314. 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/QM42K1939363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f6244dd37b8f317105cf9c7d8ee1995220c1702732a04b10b17f4b13d1407e. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:50Z), 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/QM42K1921559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ca5c55aa62341f698a880890281bb73038d1c4b714aaf838169b2724aa7152. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM42K1947211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0610ec6200fad8c8a8d0a1f98b25b2bd3e0bf7dba96f18f846d67c3412d051d6. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZES91989859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205b20327fe20817c2362552c48ffc11f117c73dfc40d9df324abc61df45cb56. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES82380339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd66a8ba987de4127b6f1d0a3799d4fe8d2deb0d1f882372b071abc2ef681f4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZFZ22164207.