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 0xffa53ee358548aa6d85be6a69a251b59cd2c2a8526d911aa0473e7e9b390e9f7. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fece6fe8-01c0-4c26-b5d8-a03199902460.json and https://artists.proofprofile.net/proofs/artist/fece6fe8-01c0-4c26-b5d8-a03199902460.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 0x148784b460a51cc66d18c142b4a79ef6066be0023327f11dd3c6101250736169. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USHM92193021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdab0b8ff88cd0e94d0cb0d6741f4826108ae92767157c16032b1d725fc05b37. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:06:29Z), 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/USL4R2121773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c2db11b44ecc940eaf1854426cb8e54e52c3fdb2770719d6e10c3c650404beb. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:10:13Z), 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/SE6SA2221820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28eac7b7f37192f0e13ef9c71d8456351a5eb34c8a4fe1efe61a1a57cd053324. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE66N2269781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82855332ff074f6c2030bf96716a3fa5c87315ef2a03f71e48c93186600fbd1d. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:31:06Z), 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/SE5752386972.