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 0x3d3425e7b263420ca6e283261add5e070b002479e5a52419c2c42ab5b82cde24. 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/093c9e7e-c908-43bc-86c1-25f6b5e0de81.json and https://artists.proofprofile.net/proofs/artist/093c9e7e-c908-43bc-86c1-25f6b5e0de81.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 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 0xa046a1bcfbef97887db1173e047b3786bfb4c98a0712ef3cd3a31585ee4febe5. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USA560512867.
Larkin' Singin' - A Sing up of Cockney Songs (Digitally Remastered)
Playlist: The Best Of The Mike Sammes Singers
Larkin' Abaht! A Sing-Up of Cockney Songs
Two of a Kind: Mike Sammes Singers & Tom Lehrer
Mike Sammes Sing-A-Long with Dennis Haywards 'Organisation'
Me Ol' Bam-Boo - From "Chitty Chitty Bang Bang"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83c7bf1a5114a5c7cf58800242c34f600bb1a965e9da3f001213fd8bf1c5aac. 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/USWD10936781.
Chitty Chitty Bang Bang - From "Chitty Chitty Bang Bang"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4a1b3787bd79035edc150b433dfd98867bf2716f2450a38b739506526243be. 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/USWD10936779.
Hushabye Mountain - From "Chitty Chitty Bang Bang"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8921c393aa7d0ac974b8ae14832b8d4175c2b9000702efe41744b15526c9f8f2. 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/USWD10936780.