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 0x35259060648998de8c900c6b2998b0af5bfaffcf250c884b881cd448a0f7d9ba. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5117d2f6-621d-44a9-8ce2-24a0daf0c29c.json and https://artists.proofprofile.net/proofs/artist/5117d2f6-621d-44a9-8ce2-24a0daf0c29c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Here's to Ben (A Vocal Tribute to Ben Webster)
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 0x2f238970a60d323eb09458e6572a6a6e9ce3c245ab60125abe5c7d1bdf4797df. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/FR59R1647593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab7f6e2e9c644d7ea6d1b5ed9161aadcc6aefa5da9b26648b3ccacb59aebd07d. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR59R1647601.
Autumn Leaves (The Songs of Johnny Mercer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d886430e1e897ed85182aec37b161db384eaafe2b57330838cc64d752e93233. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR59R1647585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c8bc0da0f020b9de6c8722dc9028cad5f511d47acc6a62dedd380ca5b476bc. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:23:02Z), 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/FR59R1647566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25846ad3700f5be3c023e40dd2f0dfc07f452acc8f7e7bbd810556c8e363a98. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/FR59R1647573.
Jacintha Is Her Name (Dedicated to Julie London)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3588594b47613caea85c37a0022bbb972f3549757c668a06ffde63627ad48aa6. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/FR10S1672033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe407a0d7c88a341591c49191224ed0a71b9fa23387425a5df5f16f99be9e6158. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR10S1672039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b2d3e5e594869752dae0483905066bac2744f2ecb58764322d8dd8333b70cd. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/FR10S1672042.