thumb|250px|Jerome Kern in 1934 Jerome David Kern (January 27, 1885 – November 11, 1945) was an American composer of musical theatre and popular music. One of the most important American theatre comp
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 0xae6eca6e8e5ed2b719bfe105873a2bd6d1a08090f7bd690829a1d88ef6bf69fb. 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/a9dc40e9-b634-4819-a110-15fb1fdb65db.json and https://artists.proofprofile.net/proofs/artist/a9dc40e9-b634-4819-a110-15fb1fdb65db.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Show Boat, Act One Scene One: Niggers all work on de Mississippi
John McGlinn/London Sinfonietta/Ambrosian Chorus/Frederica von Stade/Jerry Hadley/Teresa Stratas/Bruce Hubbard/Karla Burns/David Garrison/Paige O'Hara/Robert Nichols/Nancy Kulp/Lillian Gish
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 0xb692a0482cdfe9fe4a7dd2c848bb3f5adf6fd90f2e4f524e60bdb395331efad2. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBAYC8704657.
Show Boat, Act One Scene One: Only make believe I love you
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519be395cca170ab031eb3600031c203e4886e1f499d6f9d7f34614e89e83491. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBAYC8704663.
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
Roberta: Yesterdays (Arr. for Violin and Piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa575d819e534864c2d28ff807380e2e1cc480f93bc8465c9d5f841144405e8d. 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/GBBBC2100339.
Kern: Show Boat, Act 1: "Can't Help Lovin' Dat Man" (Julie, Magnolia, Queenie, Joe, Servants)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e723034e728a033a102552568df474b0d51061a91e656085e220792d862dd8. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/GBAYC8703631.
The Golden Age of Light Music: Table for Two
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d820c88ab8b6916ea2f25e7afa1f90427752f4da5cc6fc9ca9199ac14a9350. 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/CH6631552704.
The Golden Age of Light Music: Amor, Amor: Music for Romance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ae52a8827b718193fa909353a461024164727bf685a9eeb92e5ca06cf7f0e5. 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/CH6630753308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25115593886439160db466916155657ecd38ca7edb2577f7b560d5c8153eca59. 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/NLGZ21700031.
A Fine Romance - 2009 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1ad9652e1162adaacfaf11e003c1af2022bbb1e63bccd1fa6f8dcecf67bf4e. 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/GBAYC0900701.
Pick yourself up - 2009 Remastered Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84dc2720a21b949afef7f64fe7b75ba70719853a8c567334de9ee79777996039. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBAYC0900704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4700279b4b09ced9e20f5f35313ebe8c2ad5bc5d5755c71a16f38e6c33a3120. 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/USSM19932733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed989179b5fb560779c469a6b0faf706110949a7389ad0e89d9e3667fccd8c55. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USX761695306.
Kern: Show Boat, Act 1: "Ol' Man River" (Joe, Stevedores)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b1ddb4b7a9587b4d9bb6d59534aa6ce8cbd78d9c3d87fc657068af3d8c804a5. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:02:41Z), 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/GBAYC8703630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5d4de003a2b68dbdb938c96aca69d69450053bfb8e8d072708fae487d96651. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CH6631552702.
The Golden Age of Light Music: The 1930s Revisited - Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16021392680062baa54583d9ed08823f94f499f658087c85b748c12f05baad5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CH6630956306.
Kern / Arr. Carradot: Show Boat, Act 1: "Old Man River"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12dbe72f5e60d44d3db8f8f36148d05ef27c27c2aed9ac53621593ac52102b1. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBAYC8301039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0154fd60a2cec7f539978723ec17a3f140acdb71bca703f091077b423235305c. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/QMBZ91672702.