thumb|1942 sheet music cover, "At Last", as recorded by Glenn Miller and His Orchestra from the movie Orchestra Wives, Leo Feist, New York. Mack Gordon (born Morris Gittler; June 21, 1904 – February 2
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 0x45be048752bb3f23019840b9d1c49879aeea70edae6242a395b9fae0f2017c72. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/913bd813-4f16-481e-ab04-c181d280ea93.json and https://artists.proofprofile.net/proofs/artist/913bd813-4f16-481e-ab04-c181d280ea93.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
You'll Never Know (Performed Live On The Ed Sullivan Show/1954)
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 0x3fd516a759d9c594be4d9ac21ecf18dbcb2b61720793f5507e03050d821dce61. 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/USX761695315.
At Last (arr. R. Balcombe for vocals, piano and orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f99d73a5e8ffa2ea74724b180163585d8930b20ba63cb35a1f5a100ed10162. 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/GBGRH1600068.
Chill Out Blues - New Music for Flexible Instrumentation - Demo Tracks 2021-2022
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8c1d3a4438b2cbcf7242f7fa4c1b945b0631409a7a43ffc6fdabd3c2b594ad. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NODGN2108100.
The Golden Age of Light Music: Highly Strung
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56013d4104925b29aea6cd77828d1cc1d524c26b3f8a8b2f5bd32ddba073eda5. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/CH6631056608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb286dd0295f3e6f934f340ba8f9f7d5faf16c6f638e72d5e8a664f25ed9251d7. 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/BRMCA0400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4420207fccae4fb4aeeb64c197423fb572c083c7a070de2d54e4948a17b811. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBCJG0300434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd5dc6392a44edf9333c6525766b68ad85f94c71b58211cdee1e571bc0e34e6. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/CH6540854112.
You Make Me Feel So Young - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfada82c31e995665d8cfc11a9056b7fa521d3afca84458eabd43c459a9547242. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USSM10105889.