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 0x34d6f2cd99c0905c70369c91a2e0e453523fe77499b30bff9e9cf1458623e63d. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/81f227ac-76bd-41b3-bc45-23aefdc5065f.json and https://artists.proofprofile.net/proofs/artist/81f227ac-76bd-41b3-bc45-23aefdc5065f.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 0x155417895fea60a0c8447c98f38ec43737141c5364c3946499435fea8fb302a2. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/US83Z1208122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeb675913a67649acf8aab4c364f77b877d1dfef76b1010adc6f2ea518f1e1a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:14:45Z), 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/US83Z1212778.
Another Skin - Blood Groove & Kikis Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f51d4de5f7f6d2d080872ada89ec333e416b6679cc04a693e058f9a17c68a2e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:40:52Z), 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/US83Z1212779.
Round & Round (Shingo Nakamura Remix - 2017) - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f0aa10ebc2643f8cbf66900f0b730639b609ea7976f5cc10b4efa41ca2a3b7d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US83Z1901997.