Klaas is a Dutch male given and surname. It is the Dutch short form of Nicholas, a Greek name ultimately meaning victory of the people. A traditionally common name in the Netherlands, its popularity d
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 0xf1226a359c72a0740a0503a424e255bd9dbc559e365ea95e4b1664fa3ca6e763. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa4811dc-5ef8-422f-bfc8-68cc1af1248f.json and https://artists.proofprofile.net/proofs/artist/fa4811dc-5ef8-422f-bfc8-68cc1af1248f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Logical Song (Dimitri Vegas & Like Mike Remix)
The Logical Song - Dimitri Vegas & Like Mike Remix
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 0x3a7b2df38e60c59f3f291ce016c0e99a5a47a30b69d7b4e459204ea41d3a3a3a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BEIW12200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8813323a97c5ee13abd8ad5c3d0483a6ba62cacbee85ca6fbe5bec533a5efc0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEMA61904162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2194c9279646c11455b7b3ffc2090999e57f59cb4d2d7563d14f5c69e6abb16a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CH7812237849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65a220b4bf32f92ac737b5c8ec22800868f8ca50904513834691bbfe9ed534e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BEIW12000494.
I’ve Been Thinking About You - StoneBridge & Damien Hall Anthem Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c3445d088788b47d6e8384fa49fcd8a01cef7f9af22fb3227c1fad0ccbe6be. 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/DEA411900303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf715ff42d7fde5e3a490ef102f00014ad98e9ed2a815590d5d8fd5d78578361. 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/DEMA61903330.
Café Del Mar 2016 - Dimitri Vegas & Like Mike vs Klaas Radio Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f7ccb13f5bd731d302c1162fe273f06e502a4c663af1d65ab12d137fd9260d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BEK011600070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9ff210a6cc3ce51c3d19fe82c9a43fe64d70efb8d124cbe5d4e36dfbc9be16. 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/DEMA61903660.
Café Del Mar 2016 - Dimitri Vegas & Like Mike vs Klaas Instrumental Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce18eebf9685df61972e7e733fe1382bca82d4cd6cf34ac916bc42db02ca73e. 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/BEK011600072.
Café Del Mar 2016 - Dimitri Vegas & Like Mike vs Klaas Instrumental Radio Mix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b534c55c543630168cbd3ce923a1161428bb24e1adbef9407fdc825c6f5fee. 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/BEK011600073.
Home Alone (On the Night Before Christmas) [Deluxe Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e250cb756602d063caaddbfc7cf8f397f25df064d822ab064ed12866ac5caa. 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/BEIW12000526.
Skitzmix 49 (Mixed by Nick Skitz) [Wold Edition]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b31d3d9250b1721da64d9b507eb9ccb05c69b0d8093a02bc88878d4644bb215. 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/DEMA61401090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d68141fc2d445f50b6789cb44c76a03ae39f3ff88eeecb42b9cd9a93894ff83. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/DEMA61906030.
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