Louis Davids (born Simon David; 19 December 1883 – 1 July 1939) was a Dutch actor, singer, comedian and revue artist. He is widely considered one of the biggest names in Dutch performing arts. Biogr
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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c86ac1e5706611247c4d79a7755fad8e222ab46850968fe826a7f76d805fb3. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2770277c-b1af-46c7-a2fc-497fbc4964af.json and https://artists.proofprofile.net/proofs/artist/2770277c-b1af-46c7-a2fc-497fbc4964af.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dutch Cabaret - The Best of Louis Davids
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb0c9cd670d13e166b98e28d41185205100dcc2c18fe164efda9407eb615862. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USLZJ1620488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b14c6258f6fd27293a93d03a62167dee7420ac446f538615bcfa156baeaf378. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USLZJ1620494.
Als Je Voor Een Dubbeltje Geboren Bent En Andere Parels...
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ccde0d310ad1f50618f73ce83d86e2bac5db7fa02ddb9aea03103b0f067e346. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NLA271000176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25d294d5e61d7b7b36e7a89e41b28bbe1e766b2c62a81a362c162809d601c70. 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/CA5KR1938130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381e742e427a4b87a2ee391015efd29d9c52824c7191553e8bfe01dc29095bc7. 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/NLG620560857.
20 Hits Ven de Jaren Vijftig - Dutch Hits from the 50's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515ac2bde8b6ba53b5d5e98020fcab2740fafba4f4963e4ed367c264dc9ea7cb. 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/NLG620457493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce897a3db672cfd016e08e58478b7aeea9c6a10827d2a3525e762e4dbba836c3. 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/NLG620457508.