1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → block must exist at that height 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 0xf7c159a60effcddf58e23c4e6f6dfc35a04ddc288c1aba7ff1e56abf0d251289. 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/d5692f0b-a98f-4df2-9808-bb225bb44fd5.json and https://artists.proofprofile.net/proofs/artist/d5692f0b-a98f-4df2-9808-bb225bb44fd5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jelle Skai & Eppie D. - Remixed Leidsekade Live Version
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 → block OTSBitcoinBlock must exist at that height 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 0x6e1b30a1d910e8609140c7dd46b7e3a2b8daca38f1d1a80ea08f074f5d98a40c. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/NLA319600085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b86a0fc2ddbc719466c17fe56b7c24c476ad0cfa378c2f5257198dd5146238. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/NLA319600089.
Jelle Skai & Eppie D. - Leidsekade Live Version / Bonus Track
Klotenweer - Single Version / Bonus Track
Ik Heb Wel 's Zo'n Dag - Remixed Version / Bonus Track
Naor Huus - VARA Radio 3 "2 Meter De Avond In" Live Version / Bonus Track
Naor Huus - Incl. Hidden Track "Mick & Keith (Wie Kent Ze Niet)"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2b4e1ba1e33b4e32e3a0f0112aac19f073dc16fd6e27a921a596eb0af7ca29. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/NLA319700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b05d94a67f6f1eb25a0e9781767eed00c02f97e65811d5f63c27512ae3a367. 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/NLA319700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd863481b3460949269615c5fa04613273f9c67bba212005e4e6ea84d206f6ae2. 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/NLA319700044.
Af & Toe - Nog Affer Dan Toe Remix / Bonus Track
Ooh, Wat Ben Ik Heden Blij - Bonus Track
De Kat, De Eend En De Mens - Bonus Track
Als We Zo Doorgaan - Radio 3 FM Version / Bonus Track
Land Van Melk & Honing, Wiet & Witte Wijn
Zo Vrolijk? - Live At Theater Carré, Amsterdam / March 2002 / Bonus Track
Zo Vrolijk? - Live At Theater Carré, Amsterdam / March 2002
Waor Ben Ik Met Bezig?! - 2 Meter Session
Jan Douwe Kroeske presents: 2 Meter Sessions NL, Vol. 1