thumb|Carrell with his father in 1960 Rudi Carrell (born Rudolf Wijbrand Kesselaar; 19 December 1934 – 7 July 2006) was a Dutch entertainer. Along with famous entertainers such as Johannes Heesters a
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 0xe4d1d089ee058cd1f55301e5d50fc58f37445a01155c048c5062f2c870d84bfa. 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/36eda7b6-7bba-4bd3-94cb-ae818ab79312.json and https://artists.proofprofile.net/proofs/artist/36eda7b6-7bba-4bd3-94cb-ae818ab79312.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 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 0x3114c3874be7d4a9611830cdaf253f428a4d1983ef53c2cd35935c5bb87cb381. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NLE321800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16f8c914140bf4cd9d5f62d1f876aa950043ed0c6802a372c6bae9db78d08d5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEF458000407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcbf209975568d200b0b232aff1f117764fc53338da94c8ef0b97d7eb3bd014. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEF458000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40094189edad6d954df1d681cbf339159af1dcefa314383b51bd5a5b57e6db1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEF458000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6151b6996a6b3c3ada0fcee9acd87f9c601bad2535ea5092eb8a333a2096a8. 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/DEF457500504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe226e2e247b10b9404fa0c246b579f2d656eb223af8aa6d903d18ed3d3c186e2. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/DEF458200423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe355d7b9099d7c016c12222fb318205b39f7bacddfe923bc52db275d4007fad7. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/DEF458200501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a91398628ebb999e2490855dee46946b1fee11980139805a8953375e8d3079a. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DEF458200425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x687b4dce394c730dc1b943efd8104f07280f5e390116e36e011b93ec07f8e7ed. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/DEF458402503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c10e10f1108cb708d9074a6601b3e1b336279da34be52078bcabddb9497e4d. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/ZA42A2411518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac5aaec1cad2c1ec390549438560904497a31515801c6dea018b815931a5948a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/ZA42A2411522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33b8e6c411342422befdf7b6c3e04c39aa32279e1ad7609690a3f879417d36d. 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/NLE320500104.
Die Goeie Ouwe Radio, Deel 1 (16 Radio Successen uit de 50 en 60'er Jaren)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3114c3874be7d4a9611830cdaf253f428a4d1983ef53c2cd35935c5bb87cb381. 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/NLE321800020.
20 Hits Ven de Jaren Vijftig - Dutch Hits from the 50's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089eecadaeeebe8bc0c77a0b29ff8779b738f1ad9a06c8989b24aa2e682b0722. 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/NLG620457496.
20 Hits Van De De Jaren Vijftig, Volume 2 (Dutch Hits from the 50's)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd288f4a2a8a34f97652235e213c0a4eeda13b6c6548c607f275b4fa0896990f0. 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/NLG620515841.