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 0x1f40090ae5bfb7f80720ca22233e0ecca28dcc272de9ac71fbd95b531089d27c. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/261025b0-7a9c-4217-8e46-c0d7da450325.json and https://artists.proofprofile.net/proofs/artist/261025b0-7a9c-4217-8e46-c0d7da450325.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 0xafde1c53711d99030af4a8ca334c16a4f84873483b358ba0fb2d9eb2c4fd7300. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:05:25Z), 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/JPA962080210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3199a80f3e8f842fb2f5965159065f58b6ce15f25d0aa5480ff3885296ccce1. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/JPA961580033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8150f5b14ecefbb97d19c89b63ab9bb770506a3695e4f8cb782386c6f241596. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/JPR751400804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd8f6252df4240d47e4696e9d73defe04c95faf1a6188a8a2c47e6024f2e601. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:29:35Z), 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/JPTE01701780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4351c7b42344709f2fd1f6d3545b7900f24586cff2d85221a557e1bdb0325202. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:08:50Z), 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/JPTE01901850.