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 0x720476c703986d88373a7b9f4e408b682a77e6fb389e650e0a228b2f16865242. Chain 2 (Bitcoin): anchored in block 953938 (2026-06-16T11:35:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/207c52ec-de4e-446e-abf0-5e54cd77d58f.json and https://artists.proofprofile.net/proofs/artist/207c52ec-de4e-446e-abf0-5e54cd77d58f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
SON, do you HAVE a GIRLFRIEND? (Dad you can't see without those)
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 0x311cc294c1fc267acfaa2ceee80de22e4f07ecdc2faf2de55e7b63dcbda87fca. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:37:54Z), 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/QZTB92589393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e87d35a63c3c45ec7516b07aa74000e8bc455933e1db0db8f92d9e602424f8a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFW2578122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0ccf8b0a63892c081c5a4041b4d1aec95e7688b1be80d53bfa0c69283ca2fc. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZZ7L2572339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacfd891715fb0ef7949bb5186b75300a09a0772d2c8f6c14fbdffc125a5f0fa5. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QZZ7Q2545824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8abe8929eeaef3363f1a960f8f732a7406f175ba6cf43734b0f750f832f9dcde. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QT3F82515053.