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 0xdc7588e70a10844d8324d0f82049f9d15f8253a37fb1f72cf96c886b3ac77fe0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/896c03dd-ff88-449c-a76a-d2ef107e3ff5.json and https://artists.proofprofile.net/proofs/artist/896c03dd-ff88-449c-a76a-d2ef107e3ff5.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 0xf91ca404dab53ec5fb9f5c39d7975e3273a8e7f926d56712fe410bd8a0d68cf3. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:00:01Z), 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/THTOP1800023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x306cc4f7bf3007aa3b8e4df17d4fb8b75f32a07daeb1f48057a264102d47cf60. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/THTOP1800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a77a1e57cdd025e8b7654b45c5ad1ea012c87fcdc3662ef6b6f84228ad26089. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T14:00:08Z), 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/THTOP1900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36003a4bf0f0f7af78e15e569d4ee183b2630c05134cd1dadeaa837650e3c12b. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/THTOP1900029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b7734332ee2a2c230adbc7a42e9b357b8a8da564a8dbd7599f78b0a8d65d8a. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/THSOH2401425.