thumb Martin Jacoby (12 April 1842, Altona, Duchy of Holstein – 24 December 1907, London) was a German entomologist who specialised in Coleoptera, especially Chrysomelidae (formerly known as Phytophag
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 0x7b7fed683b87140defc60cfb7f52a81fc1c0b1d66b66d9a6bfa889fc69725d44. 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/a21a75f7-e0ee-490e-8485-941c43126cbe.json and https://artists.proofprofile.net/proofs/artist/a21a75f7-e0ee-490e-8485-941c43126cbe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Comptine d'un autre été, l'après-midi - Single
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 0x3d870715776938cb1c1f4d96ea8e59878fb90d92cb0b5ffacc3679dd104285ce. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/GBPS81528004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1480c36ecd2feb9d33d1f95cc8a7f8ef80213e186df9a9f7097c390649f1298. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GBPS81528006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea14a8455171bccb39fbe123f99e22dc713edb9a257a6eb1aba6bced15e49502. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBPS81528008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9538f2e8593a27d5ae340177f0de234fc066b31523ce04b4035b68f45adf92ab. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/GBPS81528009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf2ae3ccfaae9f6d3b82d90c212788f209502a404b5b5be6ea112aac00e70fc. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBPS81528002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec16dea36c2d667e94fdf32aafeed33efc3a6f48cc8f14e7e6e29aea2d1fd97. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/GBPS81528003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3df6cc9d8c5a85a802e5dac6f9f417b0e6bca17fe2f5b3fd4c81939ddc5754d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBPS81528141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623c7e84080c5159c0c293e4ec33d37d7383380f9a8a597eb546c9217f14b0c3. 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/GBPS81528010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599302e3fecc534ae17a25bfd3f8ac5228891e78160b742f7e9c7d275be7eff5. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/GBPS81528001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240972252c87b55d297830dd62c98e87571554aaaa0bad837713b9ea0a678a2a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GB63J1900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x240972252c87b55d297830dd62c98e87571554aaaa0bad837713b9ea0a678a2a. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:02:53Z), 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/GB63J1900034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a20e050914b17cae480bc2e35dfa1b3c3dbc1bbc48235b454862543b65e3e0. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/GBPS81687194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b5c2eb5038bcd63f7d198c155936faea3296ad55bde83bbca78a21846869d0. 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/GBPS81687192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6888a2939c1346eec74822924bff4a97e21d8c7b08d9295050bc8d9bf5494952. 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/QM6MZ1457001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a374b299d117e6e76813fb9cf24354d3d80ef77834bddd4488793cdf8e1be5. 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/QM6MZ1457006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b65b846abd165481c151307a6844904f71f2c922d4640d498af8760f993e23d. 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/QM6MZ1457028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f1faba47a7914aca07b5547d451b973709c421955c184c8fdc06c60079fbeb. 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/QM6MZ1457015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f80db90a66a3e752734287ab026d1f519355fb5e4994a5c8546ed2e2053e7a. 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/QM6MZ1457018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97f2afbaa6b3b992e0223a232c15770773c91cbaa1e1810a7512980267e1c403. 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/QM6MZ1456999.
Piano Sonata No. 14 in C-Sharp Minor, Op. 27, No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a2277246e5ac6bfc484a546150e4918e7aecabf2fa8f598d9767a34e8630010. 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/QM6MZ1457000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a7b576995f90c86309ab5cbe68f9decfd4583fc2d3aff4b062ddc2ab98530fe. 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/QM6MZ1457010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd1dcc5634779792ffb78a40cb73c29573a4d5f7643288b38ba763faa2980ea. 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/QM6MZ1457027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9bb4cfeadb847f1a1753ee449e2066df9b6e6e25cffdba6d05d7d7c54fd84b. 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/QM6MZ1457014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07511187949d2eb49483a9fea54c06bbe23e3e5eaf07f5dd441b12940295ed56. 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/QM6MZ1457019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0959588f43206125042e3f2db68dd60d5037aa012e8733db3fc4e75187662323. 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/QM6MZ1457012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82a2ed200aff836cc1924043c851935ca678529b559acc28078066861804dee. 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/QM6MZ1457020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3275d86d984171930c16f241a844bf377427fcd4eca94b4b4e5db38945277588. 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/QMFMG1498910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03c817b4a82c2e2070559ff7a7782ea92171cfa4836a2bdaea0e6a687e6644a. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/QM6MZ1457005.
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