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 0x321925fc93c8d1ed835047c612f4a2b4c8fa51289844bd18acff2684adbf5c78. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/815874e8-c9df-44e4-b790-cdefc766ed45.json and https://artists.proofprofile.net/proofs/artist/815874e8-c9df-44e4-b790-cdefc766ed45.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 0xfbbbc48800a1d98275612eb8a575c746c40a1135df6015e333ae025fbea43d5e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GX89G2237056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a12a71ef46c07f4afdb48623487ca386f809196f35b047c99970c1477577c70. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:00:58Z), 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/GBSMU0111831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0279446f343557be993e89b3151c43dc9d3493d8bb82abb5b63261e68a93a1. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:51:19Z), 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/GBSMU0111789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed34a444dd5bbda2992c62e26a4818b9d2b8042971ee265f4bf5d48a169caee2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:28:41Z), 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/GBSMU0111865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b97b9bfb6e56fa1885b0d768a755a70fd0ea546857337c91e29423720379b1. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GX38U2304458.