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 0x50c70020d5b11a3ccfae328278da032eb8964bac88c13c05abb98f5ca77ab4f5. 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/383ea86a-0e0f-46ae-847f-490e6ece96ea.json and https://artists.proofprofile.net/proofs/artist/383ea86a-0e0f-46ae-847f-490e6ece96ea.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Guitar Player, a Bassist & a Drummer Walk into a Studio...
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 0x24b6df56ebada6aa5c39472ae8e9ddadfd645b8399d59bfec28d44460ed57963. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USHM22281803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4af0e4da2d6774f3521434afb54e71f0bd27871158c56841b1e3a8abd0c0a1c. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/USHM22281805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fa0d41a36ebec89da8797309033739cfb829f7a07a66e8281d744937421fab. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:43:43Z), 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/USHM22281806.
I Get the Blues Every Time I Think About You
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a4b8697f205a60c818e55fc571b07e49ccb491e23b0da913031880b8af025bc. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/USHM22281807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbde004d42c1a5279cf46d2ac0aa8fc22260f750d28a041f09b98e4b8dab78a7d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM22281810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b36467afb640db3e77553142f9eb232a281b2d74cabda9144b530438078f3b7. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/USHM22281815.