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 0xbf376f96df3b99942cb090cc1232fe13f2c9e483655a10e1e673280893cf0046. 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/075abff5-f4ae-42ff-9a09-4e1a27f3ae4c.json and https://artists.proofprofile.net/proofs/artist/075abff5-f4ae-42ff-9a09-4e1a27f3ae4c.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 0x4d4787c5377965890ea93ee4eb41d356c1d00be8f961c675da812efd754c1e9b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFU2426378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5899809711a723daec8b70b696fac4293e398ee32fc380d4f50061f6b695070f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZZ782426841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa750779f4616735d06b5d0150c717ce7611ca99ff3634e0dcf9996917b8772c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZES62588465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6071d71dbd6229040ad3c4869b5fd3003c61d752cc4f2610c2828b9e099873. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:46:48Z), 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/QZES62588468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7af696e6433e350d0bdc2a21b92e4e31cbc46aa3978f53df993e5533a28c0a6. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:24:57Z), 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/QZES62588469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9b344da041f38112231db912e242923ae998b574902a2b82d6ea47e3fb434c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZHN42594240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a70acbe35c2c0f6495546153e157972954648ae843a6c9705fada0662c1a0e6. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZHN42594241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0a5dbc5e99676d74f15d6a4501e16278edbd6326006c99c96d76a7b430ab75e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN42594242.