John Herndon Mercer (November 18, 1909 – June 25, 1976) was an American lyricist, songwriter, and singer, as well as a record label executive who co-founded Capitol Records with music industry busines
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 0x21333844f7e3f8672e04c190af0255cab087640826b080c6064744e1e68cc739. 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/faeeac70-6a40-4431-a2d5-0c53dcb7c2fa.json and https://artists.proofprofile.net/proofs/artist/faeeac70-6a40-4431-a2d5-0c53dcb7c2fa.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f012a826cc065e4b37d37da71cab0f2040b9accdfebc49ea3d6c23812aa63ad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USCA28900139.
One For My Baby (And One More For The Road)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ffee81c073d04aaddbb72eed858ca00373183c3de064a49ed632a573e7ca6c. 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/USCA28900981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe21b6c0be0fa2b63ad37afc9770bec03851159a281734ebbf8c3d21f0676ae8d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USCA28900715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c1924c05c274a80c821ca18303838c73ccab7dab9e8121b8b87fa9e9e59f8a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCA28901242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8a3e6e85d50ab104e219ffe3357d5a9b95dbc78f168759e40a77283400833a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCA28900941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580d776f65243a15331f81884a72012919924100ec9cf55dc7fc4fcf7c080180. 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/USCA28900986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce88b63b8e16f5cb10298a402461ec6b20ce12e066b619cfb04a446e67e39109. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USCA28900881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587e2421b51ec4a193379e8b4bff6d387858233bdc61d48d880c5d841c690758. 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/USCA29200766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe17b687072b5c7f4f70963549f48d3b76aec32ed28e7f5799973ea362f48544. 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/USCA28901247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x285234374ccb3ac9c27ea2b24ce65d95cc1502be0a60c652c6df6582d67fcd1d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USCA28901243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x335e7e950e52980afb56c5a6b5d584e817162d816795d4fc48ca3f6de4d051bb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USCA28901110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47f81181ffa3b685a83478016d5ed2167cb5ba0052433e08d23c0c25c578339. 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/USCA28901082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb37c3b0ab90e4f4d6268bdb5cc1aa4e8bbc298e3ee243c349f2d6b123b1ecc7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/JPTO00001272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19f8759ff4a4f6dcc2cef44b946784744aa691d86a64181013359b16c11bdfb. 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/USRC18805688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cda541fdc445ddba0d9b2481e781bcc55ec883bc1574b191bb750ad7c2f063. 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/USMC14001985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076021ce3b97ab365bd9efd96bc3a4415ab650475428f4ce0dcc48dda8357d66. 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/DEU901501325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8ef4103490bc048b74a20ada2f2b6a5ab090dd5b272f664088bf9eb7484365. 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/DEU901501330.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75f827757ff2dcc531ebcf1ef4c3cb52ca0648e9316f8d476ae4c8f3a854bde. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEU901501328.
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
Autumn Leaves (Les Feuilles Mortes) - 2004 Digital Remaster
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba1d47e631bd2a19ddf69d98006c1cc4e8ab5b738a8945a21d1bf55dc3b5f54. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBAYE0401684.
Days of Wine and Roses (Solo for Trombone or Euphonium)
Tales and Myths of Gothia - New Music for Concert Band - Demo Tracks 2018-2019
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685e24d03bcb7822a5f669e645ff0f3291703b67356a2f68460c64802c4ac46c. 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/NODGN1807050.
I've Been Floating Down the Old Green River
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x200133902f0a06783907e0ec6ab0636c2fbd6eea387df0fbedd7d76486359bdb. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/GBN8H1329779.