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 0xde9f49e9cefaacdce37603a7e4350b8bd0c0d9a936f40c36e4977a653f9918e2. 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/f045a0d1-efc5-424a-97c0-81073e6d2492.json and https://artists.proofprofile.net/proofs/artist/f045a0d1-efc5-424a-97c0-81073e6d2492.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Music of Robert W. Smith, Vol. 1: Promising Skies
Wako Composer's Collection The Works of Robert W. Smith ロバート・W・スミス作品集
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 0x25fefe2379cdff275777a142b2f701e5bfea28d5d6b680c537c41fe35f1e11bb. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NOCJB1601220.
Lakota West Freshman School 1st Period Concert Band
Lakota West High School 2017: Fall Band Concert
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd799c0e9204bd661c0dd425eb7b83952800cf2df44638c63be90a6dd536ca1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM2EM1700012.
Lakota West Freshman School 0 Period Concert Band
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad382bdd14cd28f5afc12fa471a15b90e1bb6a8fb154666a58799e5ab541c515. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM2EM1700008.