thumb|right|The Starlighters, with Jo Stafford (left) The Starlighters were an American singing group of the mid-20th century of the late 1940s and 1950s. The group was formed in 1946, the members b
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13f9b097357406920334a409bd992272c36fe854d1ec16095b23f0646fc39b0. 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/7f51b3f3-a448-41d0-8d39-3056a985e314.json and https://artists.proofprofile.net/proofs/artist/7f51b3f3-a448-41d0-8d39-3056a985e314.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Who, Who, Who (with The Starlighters & Paul Weston & His Orchestra)
The Complete Columbia Singles, Volume 5 (1952-53)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb91632f73c86107fe61dbff612a46783d026033e032bfa976106730a46cd1eb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USSM12307806.
Puttin' On The Ritz: Capitol Sings Irving Berlin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21378880e5091a8710184bb4ac267131678b47be7c7ec5217bcff024a61e3b50. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USCA29201276.
Johnny B. Goode - From “Back To The Future” Soundtrack
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dbdc6a4fa6310082786b1b127e7030bb7736b9de61dcc0e5e4f218199e26ba. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USMC10346410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff303e890b8399c4691940251c6303a756ef5f5804abebb26a03e77b6ebab6f. 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/DEU471800513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9c82506c0b47a8d90d6b60945206cf1e0c840df7fbed937da8ae67fddf89ad. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/USCA25000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9c82506c0b47a8d90d6b60945206cf1e0c840df7fbed937da8ae67fddf89ad. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USCA25000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfab8b3799360c09b24876cce24cfff9254d289b3c583d88a48730e36bd692fb. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/GBBLY1601902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb7651b69843a70d211fb3672516faa8e8cfbe048384048dea9e835b80b55e2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USCA20700864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aaaa207dd22834aea41af9e06b623efc4c0eda9f0c05b831950e85f6dc2a8be. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USCA20700863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9c82506c0b47a8d90d6b60945206cf1e0c840df7fbed937da8ae67fddf89ad. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USCA25000067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8870c85a66f8c723f3f527a1a06ac2a4a2ceb01efeca65bce2e1acda948445fe. 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/USCA24700401.