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 0xce107b65bf6bc8ac98c8099842af12edceb6e23f6f44d10f59fd1c6ffc6ab4fc. 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/b29782aa-b89f-433c-924e-e091507975c4.json and https://artists.proofprofile.net/proofs/artist/b29782aa-b89f-433c-924e-e091507975c4.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 0x48f20fa2af9a9dcff7b5dd04d61f3cab9bb74bd9867db7fa65e13c0d21c6d280. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:44:41Z), 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/USL4R2474687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd960b25e3bfebdbeed7b9764a60c33dcfe7bb77f463b026b609c42274c6463b9. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USX9P2450082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b73cca57a48915d7854daac24aeb4506180e8efeddd04206cdb6bbae23a0e1b. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:03:24Z), 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/USX9P2450084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462680ce2ed81c309a99c6a29aac69d09fff91762404c2a3f645a0b498a2404c. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:01:21Z), 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/USX9P2450086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d967561ee20db7e290f6d592cc58228bfcadda965bebdf711e90a60e89f2f9. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/USX9P2450087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67912ba1eb942432d179ecca05fd1a70b9549e9985a9e1b3b31600d71663fc3f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:44:15Z), 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/USX9P2450088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f01ec9803b85b20b1214ff7ad01a5f907d88e0827370f2e8e1c721588378602. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/USX9P2450090.