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 0x25bf2be19c91e5bf35f65f0f390766a74d539e3e55e7ecd894543f90fa3f8401. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93e169b0-4097-4ebb-97f2-bda6495c0f3d.json and https://artists.proofprofile.net/proofs/artist/93e169b0-4097-4ebb-97f2-bda6495c0f3d.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 0x5176aae4af597bfb399643761867707af92d1bb22906ca120f7d625da97c4e25. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:01:49Z), 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/QZW9N2240184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1949d52c744c32dd79f11e89df053c5926accf721990ec9d54eceba03171223b. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZW9N2240186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d666a0736910d49d7b3dbbc0149a44ea8dd0b3268612a7478b80e9c9f9c354. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZW9N2240187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdb88a9197efa9ef5ede0321ed529402551eb50a1159591fc03cd8d9f5d8958. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/TWU712503647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9456fef394e5f5ac99a7931855e690bc415d91013fc8fc75aec987fdecbb26a. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:01:47Z), 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/TWU712504264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5531be83fbcf861c8ad203749a8df9251c510384048234768644b625592302. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:44Z), 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/CNA132501026.