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 0x4a5c05198f5e4ac297465832bdd99bc55cb90277cfa1c19933d2c05364930e55. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9bfd7c24-1176-46c4-8b15-84be290d5935.json and https://artists.proofprofile.net/proofs/artist/9bfd7c24-1176-46c4-8b15-84be290d5935.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hoofdstuk 1 - Kolletjes grote zomerfeest
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 0x4b94406a251f87e302675b8ddbc4ae39c8e79f37b412a8df2bc4f5d0513bf301. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/DEXO42285248.
Hoofdstuk 2 - Kolletjes grote zomerfeest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e665d8ab37ca17fcb05a59f80e8a2aabd36516e89ebac4e5a221ab3ba35a2c2. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:52:53Z), 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/DEXO42285249.
Hoofdstuk 3 - Kolletjes grote zomerfeest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80494a0bcb2c8d963e7f9b2b3a35597947080a96603f8c113c8e89c16053f816. 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/DEXO42285250.
Hoofdstuk 4 - Kolletjes grote zomerfeest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e230d517ecfd7410ee8e70517464d381727c96756e2353eeefe9fc385ec056. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DEXO42285251.
Hoofdstuk 5 - Kolletjes grote zomerfeest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca449660275b566675393916c85f3fc1c42c046c83fa1a2aad8cc756d9314ac7. 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/DEXO42285252.
Hoofdstuk 6 - Kolletjes grote zomerfeest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x464f9af8d00491c460c561a9a27cb3ef2962af8b8998fe084f3c8c488535851a. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEXO42285253.
Hoofdstuk 7 - Kolletjes grote zomerfeest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad195f7871cf04ed3ecd8cd847b044697e30b94acaa765fb55de7b1088983946. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEXO42285254.
Hoofdstuk 8 - Kolletjes grote zomerfeest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc49a9ee0aa87391dee0f3e8d925b73c31b5bebdd3d104930dd37ca1d8700559. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEXO42285255.
Hoofdstuk 9 - Kolletjes grote zomerfeest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d561192643a331f7a1d8a3e7590879f2c385253d8a147579af7663ad230c4d. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/DEXO42285256.
Hoofdstuk 10 - Kolletjes grote zomerfeest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdd757afc44b98af814d9aa590b0fe5b86a6d3d8e3accb5893083f00f15accc. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DEXO42285257.
Hoofdstuk 11 - Kolletjes grote zomerfeest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff11ec949839ea1e0473b1accb0eb1154904126b25418dc50aaf87d8e4d94e86. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DEXO42285258.
Hoofdstuk 14 - Kolletjes grote zomerfeest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa339271e1574f8f573e82afc7e2efa195dc49251515de4e02212f21da7eafd33. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEXO42285261.
Hoofdstuk 16 - Kolletjes grote zomerfeest
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e83b13a8b25233c71688d88d764bd4a1fc908687b725c3eece7f0fe612746b9. 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/DEXO42285263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134de0606728b00c79cf9bc133954148001bcb006825940a34e4804d6daa4eca. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:55:39Z), 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/DEXO42284988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ccd7dbc5ea579489735376e4aa9638d9d068b8218c70ce18ef0f9a7062150d. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:36:20Z), 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/DEXO42284989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c4f0764d683cab5e899e8afe0de98385950e43b0158ae7493b5b2d6c7c2c8f. 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/DEXO42284993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca786f6ff940e9d6ed01d36bb77b69ad42550da7515a53b1d02cf1f825b0da00. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:19:00Z), 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/DEXO42284995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6146327a987a4836f870250870a3ab44064c74cf7a5682aa8315af195b29280. 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/DEXO42285013.
Lentekriebels - Kolletje & Dirk (Onverkort)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c782848da9c90235defaac669fd98da423572e0f5329c6a788842e5b715f95e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEXO42283747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa865943b94fa17df370b7b3f22f7025767e542b6e326a945ecc8fe0236ebbd0. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/DEXO42283748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbde0747ef0acd3b984e9a204b3ab0654aab295dd7fe02ee0889d09a160b9a54. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DEXO42283749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179501e63125f8ee85fdbf680216a08795aebb40e456a6a6d8e3250625b52eb8. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:53:41Z), 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/DEXO42283750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95067362f43015d4c7b4d4231d20efa97a9f86fb54250011d0b05d19e3fb926e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:06:29Z), 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/DEXO42283751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab68c6ceb313e7c3af84569fd45a2db12de19062c2b86c0f885dacb5c078f3a. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEXO42283752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fc3068a3477d6e4c1a9110791da5f9c2ffe62c09c37bb5a81041eeb3adcd652. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/DEXO42283753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b8e018912be8af692d6da73007b356f01ae1bb8dac245cec0f36247b3660fa. 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/DEXO42283754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c28d8baa4727cd362b87dc03312f9d5ca041a4ed4a05d92ab17fb35626cd2ee. 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/DEXO42283755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31b5a0be0fa8e6409931c6b6f0092a35a067a84795d272f64069f6562282c731. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/DEXO42283756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d073f53f5ea88a6c0a09b3a9233d0b360d3af6e74a44b235dcd46f4fd81db8. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:50:45Z), 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/DEXO42283758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6981dbec80e797b5c7d80cbcd653a64c722cbf27b806beeea8f4b8dd4327dd26. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:39:05Z), 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/DEXO42283761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa0d0a53edc56a5403d138fb10b0f1e7705d082f085343a4972994589e4a899. 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/DEXO42283775.
Koning Winter valt in het water - Kolletje & Dirk (Onverkort)
Naar de kermis - Kolletje & Dirk (Onverkort)
Wat een beestenboel - Kolletje en Dirk (Onverkort)
Met de muziek mee - Kolletje en Dirk (Onverkort)