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 0xa49f47f89022dd0a00ae07506d32a2cac24af0adfed946728c247ae2151fe9b2. Chain 2 (Bitcoin): anchored in block 954647 (2026-06-21T04:36:58Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6fe1000-0fba-4fe0-8e9d-2d2d0f1bd159.json and https://artists.proofprofile.net/proofs/artist/d6fe1000-0fba-4fe0-8e9d-2d2d0f1bd159.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 0xa53eba4fd6414616962cd2553ffec13479185ca7ab5a30aa82a172846df6eee8. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:42Z), 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/QZNJW2565935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7109d14e2b40cb7e8ec9827e71f5ba48bf3789297044b015b81b28f9c38a0a02. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:09:35Z), 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/QZNJW2565929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c88f28e1d796dceb512f5a711551708575c054f564ee6d24b7a437fc14ed98b. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:36:14Z), 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/QZNJV2598062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67464c7f67ee87bbae305c6cbc1dd463b96c1e3fd8d6b0efbdee0f767d9c516e. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZNJV2598065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b5b9553b6973d8982c626deee0de2f7914bcb513245c3889d01f14fac8eb42. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:38:38Z), 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/QZNJV2598069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7413b7b59eb9b1b5184c13017f266c6f79c85d81972eb5b66aa7eb5672a16856. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZNJV2598064.