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 0xfeb97bf2d4091ccb5eb8835a2969ed81308b398c7c2d6b996fc10f59c3ea8d7e. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/19e6b2a3-c42a-471b-8245-796bbba5075d.json and https://artists.proofprofile.net/proofs/artist/19e6b2a3-c42a-471b-8245-796bbba5075d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Uncollected Ozzie Nelson and His Orchestra 1940-42
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 0x3e2b58dfcd228e0e6ed19e327b720777405e0055c85d1a336889c265b03e7bc8. 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/USV291381869.
About a Quarter to Nine - From Paper Moon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc183eb8d88733cf1298cda558d115ab69cdcc70cce293109c95ada9a10d0b1. 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/GBBLY0900490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c3a20dce08564d0798c30b7ad8e476a2bde128dc92fbffc4e271c499cf909f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBBLY0900497.
On the Banks of the Ohio - From Paper Moon
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe7c65d1fa0a41f0b8c3003d36f6b42265a0b87b5376b6fbf587fb142a314c7. 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/GBBLY0900499.
I'll See You In My Dreams - Vintage Thirties Recordings
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bf91f6f823e4ca136839d82a57120470f71679bef7801b6c397344826ab39e. 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/GBBLY0900514.
The Big Broadcast, Vol. 3: Jazz and Popular Music of the 1920s and 1930s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd996d8cb8322fda57b14f9ba9033b2fc375278ceedaa2558ce40edc13462513c. 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/US6R21320870.
The Big Broadcast, Volume 8: Jazz and Popular Music of the 1920s and 1930s
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f7322651bd502e8f786bd9e00643ff2f71cc73c226b205d5911e6b6c70a9f6c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USV351311387.
Raymond Scott's Merry Melodies (Vintage Takes on Scott Tunes, Vol. 1)
Tiger Rag (Version of a Jazz Track Vol. 4)
Sweet Music - Let's Dance At The Make Believe Ballroom
Vintage Swingtime - Ozzie Nelson Big Band Classics