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 0x8cfdc410ab210bf91623c5ca1d596bd5a0aef35ded67086536398925cc8c5a93. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2eafd55d-c5de-4903-9a14-80686f084403.json and https://artists.proofprofile.net/proofs/artist/2eafd55d-c5de-4903-9a14-80686f084403.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 0x7d33ebe453ca65a83560531c38f79c4424b14b273c0bd6e559c64a7bb98bc1fd. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:02:54Z), 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/QZK6G2595469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4b3cf3ae3ad1a183271476ddb07b8ab6a3d92d267d3ba7b8c36a4d1f5e07ab. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:38:01Z), 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/QZK6G2595470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3bbdd24f6220500dc48e0eb4016f27243841765f96693aec1c1a47a5bdab35. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-20T00:22:11Z), 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/QZK6G2595471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1d7f52d3701e6810bc9255e5d69c8902dd12dc00c29b9a5780dd3b03d8ae1b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6G2595472.