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 0x2ba57218e83ad3fe88dac52f12a4de0383de3f0654efd6d129c0e0ea72f1bf3b. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3536d7af-278d-4305-8360-8fe878b56b71.json and https://artists.proofprofile.net/proofs/artist/3536d7af-278d-4305-8360-8fe878b56b71.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Complete Tape Music Of Dick Raaijmakers
Filmmuziek-1: Mechanical Motions (1960) - (rev.1996)
Filmmuziek-2: Bekaert (1966) - (rev.1996)
Filmmuziek-3: Sidmar (1969) - (rev.1996)
Lied Van De Arbeid (1976) - (Version 1994)
Chairman Mao is our Guide (1970) - (rev.1996)
Popular Electronics: Early Dutch Electronic Music 1956-1963
Kaïn En Abel - 1.1 - Introduction / Dance of the Destructive Forces
Song of the Second Moon - Original Version
Kaïn En Abel - 1.2 - Conflict, Conclusion, Transition
Variations Électroniques: A Light and Frolic Experiment in Sound and Movement
12-Tone Composition for the Skymasters (As Used In 'Intersection')
Kaïn En Abel - 2.3 - Conflict, Reprise (Arioso)
Bekaert: Het Andere Woord Voor Staaldraad
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 0x0c1005ace6d9804805cf9c691cc29d2cfc0c026d748df17f7dfe321ec2930de9. 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/NLB550400706.
Sound Examples - Group 1 - from Kaïn En Abel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6defe9d321a098c3d42f299c1e0a6991594180801241ede3dc96930f690b036. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLB550400707.
Sound Examples - Group 2 - from Kaïn En Abel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e2ff1181ab1f588fc31992a663e2a2129e003bbd4bc1009129bcc808e2296d. 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/NLB550400715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x886c24f024470e7656c45680d259c087d04e60f879b0625a0f9db10f8d14db9c. 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/NLB550400716.
Vibration (US title: The Visitor From Inner Space)
Mechanical Motions (US title: The Ray Makers)
Dissevelt: Electronic Music (Collection trésors, mono version)