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 0xa4ca97dac5e998ac2ede2c9e63c0cf554221992640d21f3a3b97a33c3bc08d26. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/732f54eb-ce32-4c56-8b84-95459d7da045.json and https://artists.proofprofile.net/proofs/artist/732f54eb-ce32-4c56-8b84-95459d7da045.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Kingpin Remixes Volume 2 (Macapella Remix)
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 0x60331c68ae07a02cb27864b356edf73fe971d2cb75c90c87f71feaaa16080e4d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZWFK2572941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2d64c7ce627700c741336a5e4e69c8da148d2af2f217490326fefc4b844742. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFK2572942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663834799aa424afd5ff0781f8168f45edab33a402352cd8a44c18b0eb66b567. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:40:46Z), 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/QZWFK2572943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5dd892a59b47ededc196095c2b76058f9ffc82116a2654415594542046806f. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:21:30Z), 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/QZWFK2572944.