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 0xe1e61589f565b29060211fe424b935602bd85bc27c13c87331bf75107e64284d. 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/f9b760fe-3514-42ae-9354-f59988cb5bde.json and https://artists.proofprofile.net/proofs/artist/f9b760fe-3514-42ae-9354-f59988cb5bde.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Carnaval (En We Zingen en We Springen) / Alleen Met Jou
Waarom Heb Jij Me Laten Staan / Zandvoort Aan Zee
Ik Wil Alleen Maar Van Je Houden / Bella Maria
Jij Bent Voor Mij Alleen / Samen Dansten Wij de Hully-Gully
'k Hoop Dat Jij Eens Wacht Op Mij / Dans Wat Dichter Bij Mij
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 0x360ae53e22fed579c268e69ee0f1b750d357c94e25dba6aa1d6d4f8852b10bb2. 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/NLA340200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fece8a5c4548fe07e5e7b9b7d111e01a768fe3697b2eb7459f6ac8a11620ac8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLA340200142.
En We Zingen En We Springen / Alleen Met Jou
Jij Bent de Zon in M'n Leven / In de Maneschijn
Kom Toch Weer Terug Bij Mij / Heimwee Naar Jou
Ik Stuur Je Rozen / Lieve Kleine Carmencita
Dicht Bij Jou / Wij Horen Toch Bij Elkander
Lieve Meid / Waar Is de 5e Zoon van Vader Abraham
Blijf Van Me Houden / Jij Was 't Op Wie Ik Zo Vertrouwde
Mini Midi Maxi / We Hebben Dorst en de Tijd
Kom, Geef Me Vlug Je Hand / Wakadi - Wakadoe
Ik Breng Voor Jullie Zonneschijn / Oh, Fata Morgana
Jij Bent M'n Troetelschijf / Met Boerenkiel en Petje
Blauw, Blauw, Blauw / Drink Nog Maar 'n Glaasje Water
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3ac256a662a676139389249b6efd32415fc65840eb199f6d838241ad75bfd1. 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/NLA340200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c3ac256a662a676139389249b6efd32415fc65840eb199f6d838241ad75bfd1. 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/NLA340200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6116b842aca5b4e901600008b02d9f98b45ec11ecd9d5c04632e55f0f322e7f7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/NLA340600320.
Het Beste van De Heikrekels - Instrumentaal, Vol. 2
Het Beste van De Heikrekels - Instrumentaal
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996b02aaddfa3496d0f618a469cc4254a2165e0bfccae25266481ef466ab3855. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/NLA340800130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38ec3d7902d7b0504253c41f6756da3e7df99c277e8cd9be15fcfa724111a188. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NLA340800134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5252d385fe1281a3e9418c4d3d613f4ef3faaf8d92150411374244290118e7. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/NLA340800137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c207ee82230d374108b60bcc727358c048d72f7f73f3a7cb92732d1181de58. 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/NLAX70922574.
De Gouden Jaren van Telstar: De Heikrekels, Deel 1
16 Telstar Favorieten uit de Tijd van Toen, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ff9eb8b0cb140837c66a8ef7336ece904a2ea43bfd82331ad176eee8760a3f. 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/NLA340600737.
16 Telstar Favorieten uit de Tijd van Toen, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf776e6b7ce7df93b1ba3624f49e8114f70463e53350794711c9c41fdd6ac14d. 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/NLA349400407.
16 Telstar Favorieten uit de Tijd van Toen, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92980117d6cb65f5b7b47bd790d2d2054472fa11646e6b7f16514ad1a585dbc0. 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/NLA349500162.
16 Telstar Favorieten uit de Tijd van Toen, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fecb55d0c1fadc9309cbd879f83dc43519b2cc66f5c9dd66f1f7ef914c2db25. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/NLA349500024.
16 Telstar Favorieten uit de Tijd van Toen, Vol. 14
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eeea5055c7e73447aebeb3e535a34000bc61caa0732b02f2d0ec28f1c00c197. 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/NLA349700161.
16 Telstar Favorieten uit de Tijd van Toen, Vol. 8
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffb475e56c324868b9a36870fc42e39fda6a7525630a3231d6d43ea749f4eb49. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/NLA349600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e2817603344f922161ab174df9374b7eb523aefd84a5d3953192ee4c064814f. 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/NLA349600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e8bc07481255659ac69604cacd746f04c22dc1dafa69ef7fa09b51f9bf8896. 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/NLA349600019.
16 Telstar Favorieten uit de Tijd van Toen, Vol. 11
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fcba6b6e8f8f40bdc0c60aace99f2156c0c806c0ac15d0dca2a4a14cffad99d. 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/NLA349600243.
16 Telstar Favorieten uit de Tijd van Toen, Vol. 24
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d41eb2e81d426a65f9e9a8c08f6384f3fcfb7caf7e133d688d5eef9010b563. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLA340200150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3e7dc5f618b0e1f82783f3d6bbfb6b050afb17987529f23f6bab711156db77. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLA349600339.