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 0x23de8f13e5406a2fed11300388277a419130107940c3eaf05e6dbdd9a9535dc1. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b83f2122-92db-4be8-8c7b-d38e31ca1d95.json and https://artists.proofprofile.net/proofs/artist/b83f2122-92db-4be8-8c7b-d38e31ca1d95.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 0x372ffd5002971e206d7e0b3060341560f99153bd325aca3204f4dfd267de00d9. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:09:29Z), 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/IND832212054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894a5bec1aa47c20d5896aef0ec7cd42288a604f65bd1fa99b6e33f6fd7a3bd4. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/INN632300701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29e3245f2cf05a78386f13624bc0ddcb28c433656c17a2c010bcf417c9a57325. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/INN632300728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e968af6d692d33244d6880696aa647ad5e6da591029d11ceea399e043e1f718. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:22:35Z), 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/INN632300733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef72d01043db6c0403cf282f4082779127278d38d07a7689106decd55e8b012. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/INN632300759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28e6697712c6f0e030ff781e4a9d595aa5c16ed3e38ca73be42d7a4a5beeb23. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:41:09Z), 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/INN632400428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85acbe341817afcf82fbee1c523bfc4d200e82ae3cd0882cca3191a46dffe32f. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/INN632500465.