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 0x0285acbb781e76156a18453c703c3f6babca42fc8836e4e14135fc59a62377c2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f30af9f9-8bf7-4e53-b588-8af3914a67f3.json and https://artists.proofprofile.net/proofs/artist/f30af9f9-8bf7-4e53-b588-8af3914a67f3.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 0xcfe0805837f11386980fa25558652f4e73ebe5b6c076a1c23d326aefe14dad1d. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:48:30Z), 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/QZHN91908367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498508a6748dc53aded5e7ca0677e7e66992c1d9f3d62641d930a69b983e294e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHN42019136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5c3bc92501781d05ad195f07cbf42d09003d16b9f3ef47bffe69a34c94e10e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:56:13Z), 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/QZHN42019138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da4b935d6bf1a52b33655dea0b2416b027f155c711ea313ae53b4aac7a0ff38. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZHN42019139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cbf88b0b7ec4eb463962fd9d55b0de2cdf5425e83cba43d7ecd28592b38603. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLRD52117972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cbf88b0b7ec4eb463962fd9d55b0de2cdf5425e83cba43d7ecd28592b38603. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLRD52117972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cbf88b0b7ec4eb463962fd9d55b0de2cdf5425e83cba43d7ecd28592b38603. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLRD52117972.