Charles Louis Laurent (18 March 1879 – 10 July 1965) was a French trade union leader. From 1899, Laurent worked for the Deposits and Consignments Fund, eventually rising to become office manager. He
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 0x0fdf5aaee7db21ab904d4a23378bbd7a6268dc83dbe77072c945d1cd147fbc16. Chain 2 (Bitcoin): anchored in block 953730 (2026-06-15T02:47:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/953af855-19a6-4f37-bab9-f9c98b528ec4.json and https://artists.proofprofile.net/proofs/artist/953af855-19a6-4f37-bab9-f9c98b528ec4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Classical Music for Studying (piano music and strings, music for concentration, piano and violin)
Study - Focus - Concentration - Best Music for Brain Power (Intense Studying, Study for Exam, No Stress, Memory, Relaxation, Deep Focus, Music for Maximum Concentration, Music for Office, Hom
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 0xa2002aa05df58a26d25eb080e18369747fc412adf704b2415b4ed0f0576a1f2b. 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/ITS781604596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf550843d5e5b4cc20ad6e32bc5a5c54481f051539dfb4772d77d26cbaf5e9243. 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/ITS781604597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14cbfbce79a4e4490a5b8f09391f87dfd4fd1ae13a5bb500c914dc8c9f061104. 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/ITS781604598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5791e9a226599b50cd9547d591273578e30c3fa45b61e09df2b1af0d1c7f6c. 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/ITS781604601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1353278970b9af4fc6f6bf7aa3235dd1ca823a3f6dec4ef8488482dbe87f21c4. 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/ITS781604602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b805d17a003996cb919d258c122c6f473ddd0d0f4fbd712a8bf971dbb2b92a9. 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/ITS781604607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c0633e380a17b4b35f3553ea3bac8a07921ade61aad5f4fa5ff73095750f1d. 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/ITS781604608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc663b879c0ed72cc9c97537198fca527b3c8635466351fd9c8ce0397c8fcf70e. 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/ITS781604609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d6c5396cbbbc80d99050f80b3a31e4780b35ba30cd9cc63c3b910fcedcb6f6. 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/ITS781604611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae6e77ceb342b7ca9aa7f0496e34c31f7008ad0bca86eee503531425eb8016d. 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/ITS781800905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08234eac7a7c9b1f40adda2331d9e7947ff9057fb418dc6c5074beb17891c136. 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/ITS781800913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95221bb145c2cbcaffe4d83ea93adbb73f8befc81b361e439f43fe0cd521130. 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/ITS781800915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1da3300614abbb332a91143f9dc87f8f281ed5337bf91eb66c244f59c2419ff. 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/ITS781800916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328a9f873d8a56fdc66f66a29d3e785b2e0b0dcd5561de65c7ed6dea9d199d40. 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/ITS781800815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8070a7e5138b32be3c90ecd3a19b50f03b65f546c629f856d4056d26f967349. 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/ITS781800706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ee7a5a6709f26e120d42cb23f044d4bc78b12392190270cbb8915205eb6d7a. 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/ITS781800715.
Shades of Piano Vol.3 : Mellow and Peaceful Piano Pieces
Shades of Piano Vol.9 : Mellow and Peaceful Piano Pieces
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58878661bf71ca64b24a4bc1d8fd446e0e24a31baf7b0c4f7abebe809acd3c4a. 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/ITS782300330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c9cdcf489bfa93cd44feb38a8ac61dfbd962073b3b1b255ec32e788b08c50d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:27:21Z), 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/ITS782300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c3ab65bb872caddca188bb5088bd0195bcde17e5664e04f4c85f1746c5be73. 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/ITS782300331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe255dd2753b8c7e7df2cf8ed59d39b1b2d73945ba6c19c1ecd7118b1504be0e0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ITS782200149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb202606d24aa1609be46bb702d323aa70c635f10258119e58d5497cde6aac526. 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/ITS781800308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd61715b4ef8caaa6814e43fba6112a0270f8296a9f22c3a443182d526688060. Chain 2 (Bitcoin): anchored in block 957304 (2026-07-09T12:19:34Z), 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/ITS781800309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f5a4087ce2e222f198efbe7047dbe3504df99126985049001c49c1cc95a0ea. 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/ITS781800315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe143e39185d74abf4faa0003682694780aabec3c2fc73d91e1a83885d8ed6ab9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITS782401635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642c50c593d7ff13cecbd23bb272a27f88c1632fdaf518c6bcfe7e9dfadb2004. 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/ITS782401537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf78e85aa339272f18f05dd4f58aa7ea2b480c4ca99f4fa2f3313fe5b2e5ab0. 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/ITS782401504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a8b33dbd1199a547d42a44fd5dce5eec64a6f2973554240bd30faa76240d0f. 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/ITS782401280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79d4d2cb46d968acb88476c51d9087530dbaf80b4da334269192fdac93b48504. 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/ITS782401049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728bc6a7647845c2ccef771cd3a2f9cc8644ac056c69503ca5b74b2fed87fbb2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ITS782400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020dffeebc74215843e29bb4de90281132010a20eb914f58ea411e303ba8de92. 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/ITS782400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d42c2068a1aaa8d86f5f1aa8a4ec5e6853b59d2c5ff637181e666136372b59. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ITS782300903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c9cdcf489bfa93cd44feb38a8ac61dfbd962073b3b1b255ec32e788b08c50d. 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/ITS782300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe255dd2753b8c7e7df2cf8ed59d39b1b2d73945ba6c19c1ecd7118b1504be0e0. 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/ITS782200149.
Taste of Piano Vol.3 : Pianists Today Playing with Emotions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb8321eee0f4412445875332e703802f9fdaaa92059930ec089bafefd73fba5. 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/ITS781701992.
Classical Music for Reading (piano music and strings , study music , music for concentration)
Emotion : Soft Piano Music Vol.2 (Peaceful Piano, Relaxing Piano, Piano Moods)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abd71585fe2581f600d4751ec2a74ea154feb5d863881ac812b974543607a80. 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/ITS781800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d3c847a495b61e258351d85a1a4c8dcc0b6e443e0552740a864b110247c4a3. 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/ITS781800003.