Jacob David (15 November 1873 – 26 May 1967) was a Persian-born Assyrian pastor and relief worker. He was born in Seyr (Sir), a village to the west of the city of Urmia, and died in Chicago. Sources
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 0x864ecd7711af567c52b064489acb512bd5bc6864eff69f41c88b2cdd4aea9df0. 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/47acaa54-87f8-4ff1-9c8a-748a9ce798e5.json and https://artists.proofprofile.net/proofs/artist/47acaa54-87f8-4ff1-9c8a-748a9ce798e5.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 0x87f0e90e0c863fbfec2a491db95abbb9de2194d8a8d07b89358a66b157a56505. 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/SE5ZV2111101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78cd74032d5a738a29c5ad6e1051ba5672db558ff90d59e2d7554e0ff47457ea. 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/FRIDO2410198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb421a60f3767a7f420fbf462cbdda7f6a60a7a7ff095077453808d171940d24a. 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/FRIDO2410200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f82917f801f5c126bc27ac6897e4654e591475cb66e4b323d5744c3cb018b2e. 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/FRIDO2410202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x693c493fa063ffdaccd8c2517915a87861fc3e6ec6d0d5e46e4fabe05a99153f. 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/FRIDO2410331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886f19179739ecd0b8556a305454f7cb36cbe3b955a220487d3d4eae9892d8cf. 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/QMFME2003943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea14c83b50b4cbcb92dd04348b1db0c56eab9d62fb1d9547861d7c75bef43ca9. 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/QMFME2003945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6facef3dbe6665659a45d6ff4e57b0c7660bb2b510c837ad0379260ad72b3d5e. 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/DEZ651365094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5c074de9f3b36f3a2a85a3767c9da04e50d36c22f04e31127a31cd55415f32. 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/DEZ651365097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c55466ddeb43c1d4eda5c484803322c18e434437f37e74468c7fcbad618384f. 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/FRIDO2411876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829e288ba9c39a022a5080853f67f3bef1b9c30053bccfad827f97179a02dbfa. 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/FRIDO2410674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc263d6bde413489a02b44b654346dc05ab034f43da7c3bee5ef31f350aa8bd70. 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/FRIDO2314231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e652fcc341c25640081ff00885b44481fde214ebc7ca081b2afee44e9cf35c8. 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/FRIDO2312861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f25021b877c2b924d4f6bc7d31e6766f4045607e287811a0162de634d2c715. 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/QMBZ92346272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85b98985259849c300158eac7dfb11dbaec6626fca9f3d1a8c0ea3bcd1d5765. 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/FRIDO2311229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6d534db8be08ddc7dbadf76c6b65c1d446ccbf83c98ce5bf7881810ac80acf. 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/FRIDO2310162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270e47f79638d9c3572d6cee2ea567ef62752348843628f9368d61831daaf4fb. 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/FRIDO2210684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46914b44da4f0f2cadee34ad9a63e9b98f1be7fd42e7eedb72e8d546f0028b26. 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/FRIDO2210343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063efbcb0c2b943ea1629d20b4175cb6e98f3533a22eaaca7369e6fdedacce5f. 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/FRIDO2210183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1328db7bb36d288e23b1c6527b1abc6691b37c7f07d883d4c8b45cc85af5131. 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/FRIDO2113096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f4309ffeb15a23a483392c408c6892a550e97b56b2c521b80ec50b517da592. 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/FRIDO2111643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdafc193f7a76674b2ef85e02eed3c716db49f8aea2dc792608b674b071e5446. 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/FRIDO2112295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47010cdec690d8de1a79b8ffa4c0a08dc40d2261612687cc60fdb86991a39797. 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/QM4TX2152470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9da5cbca09abacaefc0b41442589114f214e36a46265b8e92ae07a2c4a8d973. 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/QM7281995762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1d666934cccb4044a4cafbb2c74478b1d9e906ff795b68d6e9e3c9e917224e. 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/DEZ651722400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2114f0e1c0cf9de57477264d0717ab1a13eb819b6f3b924a3c0e1ea7a8f71f. 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/FRIDO2414710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab08e3c13a4269d909982849a6c145e76e69eb0248f8e78b96fa65114bc5c07. 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/FRIDO2414344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cad5304feb0b46befd3a4cdc3616b38c05f32c4bd56ac5743064fb6f4fe13b8. 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/FRIDO2413779.
Giardini Di Boboli (feat. Jacob David, Grégoire Blanc)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad9181fc8d486d2c0c968e34c084188f8a4f7fb2d9119c03c445f90a9b06c62f. 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/FR96X2237888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7643fd029d858c883b756045fe61a522660f86e55b88f0bda5a9f03942548f. 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/FRIDO2417328.