Simon Harry Piers Jeffes (19 February 1949 – 11 December 1997) was an English classically trained guitarist, composer and arranger. He formed, and was the primary performer of, the Penguin Cafe Orches
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 0xf5ad8d79f02b24f3a2dd359781a31edcc8d20d6ee6458b2aabea00db917ca58d. 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/3a305cc3-ed6e-49a4-a824-72efd6b0981f.json and https://artists.proofprofile.net/proofs/artist/3a305cc3-ed6e-49a4-a824-72efd6b0981f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jeffes: "Still Life" at the Penguin Café; Four Pieces for Orchestra
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 0x894cfd17965a9384f385a472f119ce22c3a99e31ac7738a121cf380e0ee03054. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:33:10Z), 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/GBS8L1100057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c4d4bd8559828b52c231bd181b79e16bf0b331cc83c9c15476eed98775d5cd. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBS8L1100060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98ccef96effb21b7325f97c01eba5b22c40bbf0672bbbf73669ef4524a7cfb16. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/GBS8L1100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x278195785a516ae87b54d432bc8bd40b8281ada823981c5bf49dd9a1a17fbde7. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:40:33Z), 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/GBS8L1100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f0f154bf9389909cbb6e863c62449bb169dca6849cf1036cdc7e291290f46c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBS8L1100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d39c43a39da6732b42cd2ea04b59974444f61b9f14bb5119b3514702ca2be5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBS8L1100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23231548d2d4dbc1cf7b4e9159a4c428714054976a84647305b25b882ac3dc32. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/GBS8L1100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed43c678e4ffdafc987f6621fd3da7deb9776293c4b6c0de38775d9854007132. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/GBS8L1100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81193ca3cc441f7ba7cf73f104c568afcf72e0cae8eaecac8e6e2b3f41bf7c12. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:40:41Z), 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/GBS8L1100036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7d91a2f2294dd344ea3fe63956cff8d70fb907de221428fc134671ad8e0403. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBS8L1100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee1be5ee0c46cc11c0f246445a2de45a70e4be563cb10c53109671e18d5c71c. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:03:48Z), 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/GBS8L1100043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f3bea7aec2e4dccf2cba8de2743054e963a5a7e0201167ad20bdd7aa9941de. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUAB00950238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbc590a870f4db91047e37e1e31965ca7e94f240bd3cc393d1c1549c530e766. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USBC19704127.
Music for a Found Harmonium - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6732115e8abc0f60509b4830959f85039780798468c2c9590f056aa9ba3e772. 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/USSM19931669.
Music to Study By: Classical Music for Your Mind
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f3bea7aec2e4dccf2cba8de2743054e963a5a7e0201167ad20bdd7aa9941de. 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/AUAB00950238.