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 0x2721fcf54b8a345bc2e4e2ce530e26d0ccc182a4b8fb104e0fcb1eb12357d9ac. Chain 2 (Bitcoin): anchored in block 953959 (2026-06-16T14:51:55Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/27ce481f-4581-456e-ac5b-6d3e8df15044.json and https://artists.proofprofile.net/proofs/artist/27ce481f-4581-456e-ac5b-6d3e8df15044.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Variations on "I Got Rhythm" - Remastered 2023
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 0xa453fb53534b4f643f054e1b9951111d757770d8f2e7c02c6e2ffa09caa8edf9. 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/HKI192317705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aeb193f73596b84bca8780e6c256364e97fdaaf63cc910db4aac079bf4471c. 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/HKI192317706.
3 Preludes: No. 2, Andante con moto e poco rubato - Remastered 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7602e691ee245b4ba4b38e0beda5896a780d5a0136de7e8348903fede797e3. 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/HKI192317708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa918f1d9e9b786d1091f175d22e983cccce32cb31ba103e9441d4da1ef7ccb7e. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKI192317710.
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
Someone To Watch Over Me (Arr. Keith Jarrett)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632f882ce322274b657f7e1515c8d11d3d13c271074a58a215c5cb917a05c9ab. 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/AUAB01250644.
Someone to Watch Over Me (Arr. Firth for Piano) - From "Oh Kay!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f0a994d4a8a3c5ebce2946358bf82fc95bd4faf862ad81fd5cf9db2e8465a7. 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/GBBBC2301560.
Someone to Watch Over Me (Arr. Feinstein for Voice & Piano) - From "Oh Kay!"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47be83bf7542dccfccc691668ab633585d64b41b9a69f429e3f03688fc924d7a. 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/GBBBC2301561.
I Got Rhythm (Arr. Firth for 2 Pianos) - From "Girl Crazy"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f7b24f6f995ced50d663b195c4827bd6806ebbe97f2e003968ee50f7c531346. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBBBC2301562.
7 Virtuoso Etudes: No. 4, Embraceable You (after G. Gershwin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44774ed5cc9e5c541244a8ff6f08532728e3d0e6f972ed40608d58ebe2f0cfd. 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/GBBBC2301564.
Sweet & Lowdown (Arr. Firth for 2 Pianos) - From "Tip Toes"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8acc622548549b7a32c3acdb131347ab8e0199c3b42e977bd727cb7a1420c3f1. 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/GBBBC2301565.
They Can't Take That Away from Me (Arr. Feinstein for Voice & Piano) - From "Shall We Dance"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7e1cfce7714d6d2314fc9876e541b323a6cc19df546450c3667b1ac9e5ae28. 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/GBBBC2301567.
The Man I Love / Rhapsody in Blue (Arr. Firth for 2 Pianos) - From "Strike Up the Band"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b100a51594ad9cca1ce42e6832e94f19e9278a9cd8d774edd0f3425b7dd7346. 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/GBBBC2301569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb119c3ae5e58400970eee1c0f7cfd6e0ea83553f06b99a420c60fbec8067d450. 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/GBBBC2301570.
Graceful and Elegant (Arr. for Piano) - From "Shall We Dance"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5aed7be98cf72ae90d1623eede3cc7e2cd069aa390fedc1e3a020f142b04b47. 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/GBBBC2301572.
Our Love is Here to Stay (Arr. Firth for Voice & 2 Pianos) - From "Goldwyn Follies"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b5fd07bb6ac94a070441efb159d4e5e46e21c1fb3e97d1285f2561f9b1eedc. 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/GBBBC2301573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9593a325b07b12ba47acf4d8ad73540b62d3d3670cfa8f89ff8b17d123ad95. 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/GBBBC2301576.
Jasbo Brown Blues (Arr. Firth for 2 Pianos) - From "Porgy & Bess"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a61ac2849a7860a79117fce860a743c3fe3aab2b55e3b498d35c91202e7062. 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/GBBBC2301578.
Rialto Ripples (Arr. Firth for 2 Pianos)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c2dfe14e48ab7450d7318faa03b601649b6dba7375b4a540cd29af57dba73c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBBBC2301575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6edf8b5f689420fc11acd183d0d5d5cc522f23eef42839538205947b35280ff. 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/GBCJG9900291.
George Gershwin's Song-Book: No. 1. Clap Yo' Hands
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ae02b29df48641e6d69fc503d43168eb9b4fd05882328cf66292db973e6487. 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/ITBZ81605653.
George Gershwin's Song-Book: No. 2. Do-Do-Do
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5654b0bf15a601202ee962da7e671cc629e0cb846f0d700f75ca38440afffd. 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/ITBZ81605654.
George Gershwin's Song-Book: No. 3. Do It Again
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f5fb8fed151e4eecc6ffb53efc654917467e38c61afde0351ebea7144bd929. 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/ITBZ81605655.
George Gershwin's Song-Book: No. 6. I'll Build a Stairway to Paradise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acd1982dd7d27495b4cc05285e81e0007cf34d53cd646bef48794d552ce4ecb. 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/ITBZ81605658.
Promenade, "Walking the Dog" (version for piano)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe72dcb9f1e2092d1ac0e567d7b004d1ba7568ac84fdd39678df3e017302ff8ba. 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/ITBZ81605670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff73c552bba9a19a02dcc40b769f9dfbe65a7a1125610b2542c72c9cec2550d. 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/ITBZ81605675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x142fd35245e9b4c5657944020c5f11bc36cebe4e2f2c23a46a5be2e6484a46df. 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/ITBZ81605677.
George Gershwin's Song-Book: No. 13. Strike Up the Band
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d993bddfb081ce2c850f67bed20331c78763d520bdec38b03db98dbf0b0ccc. 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/ITBZ81605678.
George Gershwin's Song-Book: No. 14. Swanee
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b1d01f71229facad6bb2abab17482d4a4131645aaa2ae89748ee1bbaf9a967. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ITBZ81605679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a3a6788f1822e350ea4eacda3d13353829bd3f64fdf7de26db35147208378a. 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/ITBZ81605685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e62e13da5e56fee0d57609d5a4381b05ddad434ca53a82caa9e92f1393c518. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWM22200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768309e4602ca138d76cb5a22dbc174a40dbd2cf15f52ffa004821cd30687461. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWM22200014.
Rhapsody in Blue (feat. Eric Jacobsen & Virginia Symphony Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ae5e879768a3df0a410b1d5948ec41a0842e3169f149cf656dd38b2a1ac3c8. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZWM22200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ef9f6e74d9840ac881e3d888b3565d56eb05fbb9c8e56dd07910f884dba5d9. 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/QZWM22200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b827db175dca600d3416f8e84d457fc2b7ce763c67ef23b14d86fd072fb159a. 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/GBLWD0401313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9be6eddd1259b70c107ad7873c5bb3a25f106547d543e940f12d20c3ad578f. 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/GBLWD0401318.
The Girl Friend (Colchester Theatre Cast) [2021 DigiMIX Remaster]
Italian Saxophone Quartet: Four Seasons of Buenos Aires
Rhapsody In Blue (arr. F. Mondelci, M. Gerboni, M. Marzi and M. Mazzoni)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f94775394c3c9a3a1c6b002259170b6569297d4604a1d9baa98e7c9b64b971. 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/USASX0938708.
Gershwin, G.: Musicals (Arr. for Piano) (Gershwin: Remembrance and Discovery, Vol. 2)
The White Peacock - American Collection, Vol. 1
'S Wonderful: The 20s & 30s in the Americas